638840520

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{73}}^2$

素因数の和:206

約数の個数: 240

約数和(自身を含む): 2235869460

約数和(自身を除く): 1597028940

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 37, 40, 45, 54, 60, 72, 73, 74, 81, 90, 108, 111, 120, 135, 146, 148, 162, 180, 185, 216, 219, 222, 270, 292, 296, 324, 333, 360, 365, 370, 405, 438, 444, 540, 555, 584, 648, 657, 666, 730, 740, 810, 876, 888, 999, 1080, 1095, 1110, 1314, 1332, 1460, 1480, 1620, 1665, 1752, 1971, 1998, 2190, 2220, 2628, 2664, 2701, 2920, 2997, 3240, 3285, 3330, 3942, 3996, 4380, 4440, 4995, 5256, 5329, 5402, 5913, 5994, 6570, 6660, 7884, 7992, 8103, 8760, 9855, 9990, 10658, 10804, 11826, 11988, 13140, 13320, 13505, 14985, 15768, 15987, 16206, 19710, 19980, 21316, 21608, 23652, 23976, 24309, 26280, 26645, 27010, 29565, 29970, 31974, 32412, 39420, 39960, 40515, 42632, 47304, 47961, 48618, 53290, 54020, 59130, 59940, 63948, 64824, 72927, 78840, 79935, 81030, 95922, 97236, 106580, 108040, 118260, 119880, 121545, 127896, 143883, 145854, 159870, 162060, 191844, 194472, 197173, 213160, 218781, 236520, 239805, 243090, 287766, 291708, 319740, 324120, 364635, 383688, 394346, 431649, 437562, 479610, 486180, 575532, 583416, 591519, 639480, 719415, 729270, 788692, 863298, 875124, 959220, 972360, 985865, 1093905, 1151064, 1183038, 1438830, 1458540, 1577384, 1726596, 1750248, 1774557, 1918440, 1971730, 2158245, 2187810, 2366076, 2877660, 2917080, 2957595, 3453192, 3549114, 3943460, 4316490, 4375620, 4732152, 5323671, 5755320, 5915190, 7098228, 7886920, 8632980, 8751240, 8872785, 10647342, 11830380, 14196456, 15971013, 17265960, 17745570, 21294684, 23660760, 26618355, 31942026, 35491140, 42589368, 53236710, 63884052, 70982280, 79855065, 106473420, 127768104, 159710130, 212946840, 319420260, 638840520]

約数ペア:

[(1, 638840520), (2, 319420260), (3, 212946840), (4, 159710130), (5, 127768104), (6, 106473420), (8, 79855065), (9, 70982280), (10, 63884052), (12, 53236710), (15, 42589368), (18, 35491140), (20, 31942026), (24, 26618355), (27, 23660760), (30, 21294684), (36, 17745570), (37, 17265960), (40, 15971013), (45, 14196456), (54, 11830380), (60, 10647342), (72, 8872785), (73, 8751240), (74, 8632980), (81, 7886920), (90, 7098228), (108, 5915190), (111, 5755320), (120, 5323671), (135, 4732152), (146, 4375620), (148, 4316490), (162, 3943460), (180, 3549114), (185, 3453192), (216, 2957595), (219, 2917080), (222, 2877660), (270, 2366076), (292, 2187810), (296, 2158245), (324, 1971730), (333, 1918440), (360, 1774557), (365, 1750248), (370, 1726596), (405, 1577384), (438, 1458540), (444, 1438830), (540, 1183038), (555, 1151064), (584, 1093905), (648, 985865), (657, 972360), (666, 959220), (730, 875124), (740, 863298), (810, 788692), (876, 729270), (888, 719415), (999, 639480), (1080, 591519), (1095, 583416), (1110, 575532), (1314, 486180), (1332, 479610), (1460, 437562), (1480, 431649), (1620, 394346), (1665, 383688), (1752, 364635), (1971, 324120), (1998, 319740), (2190, 291708), (2220, 287766), (2628, 243090), (2664, 239805), (2701, 236520), (2920, 218781), (2997, 213160), (3240, 197173), (3285, 194472), (3330, 191844), (3942, 162060), (3996, 159870), (4380, 145854), (4440, 143883), (4995, 127896), (5256, 121545), (5329, 119880), (5402, 118260), (5913, 108040), (5994, 106580), (6570, 97236), (6660, 95922), (7884, 81030), (7992, 79935), (8103, 78840), (8760, 72927), (9855, 64824), (9990, 63948), (10658, 59940), (10804, 59130), (11826, 54020), (11988, 53290), (13140, 48618), (13320, 47961), (13505, 47304), (14985, 42632), (15768, 40515), (15987, 39960), (16206, 39420), (19710, 32412), (19980, 31974), (21316, 29970), (21608, 29565), (23652, 27010), (23976, 26645), (24309, 26280)]