20988240

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2$

素因数の和:98

約数の個数: 240

約数和(自身を含む): 82744704

約数和(自身を除く): 61756464

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 31, 35, 39, 40, 42, 48, 52, 56, 60, 62, 65, 70, 78, 80, 84, 91, 93, 104, 105, 112, 120, 124, 130, 140, 155, 156, 168, 182, 186, 195, 208, 210, 217, 240, 248, 260, 273, 280, 310, 312, 336, 364, 372, 390, 403, 420, 434, 455, 465, 496, 520, 546, 560, 620, 624, 651, 728, 744, 780, 806, 840, 868, 910, 930, 961, 1040, 1085, 1092, 1209, 1240, 1302, 1365, 1456, 1488, 1560, 1612, 1680, 1736, 1820, 1860, 1922, 2015, 2170, 2184, 2418, 2480, 2604, 2730, 2821, 2883, 3120, 3224, 3255, 3472, 3640, 3720, 3844, 4030, 4340, 4368, 4805, 4836, 5208, 5460, 5642, 5766, 6045, 6448, 6510, 6727, 7280, 7440, 7688, 8060, 8463, 8680, 9610, 9672, 10416, 10920, 11284, 11532, 12090, 12493, 13020, 13454, 14105, 14415, 15376, 16120, 16926, 17360, 19220, 19344, 20181, 21840, 22568, 23064, 24180, 24986, 26040, 26908, 28210, 28830, 32240, 33635, 33852, 37479, 38440, 40362, 42315, 45136, 46128, 48360, 49972, 52080, 53816, 56420, 57660, 62465, 67270, 67704, 74958, 76880, 80724, 84630, 87451, 96720, 99944, 100905, 107632, 112840, 115320, 124930, 134540, 135408, 149916, 161448, 169260, 174902, 187395, 199888, 201810, 225680, 230640, 249860, 262353, 269080, 299832, 322896, 338520, 349804, 374790, 403620, 437255, 499720, 524706, 538160, 599664, 677040, 699608, 749580, 807240, 874510, 999440, 1049412, 1311765, 1399216, 1499160, 1614480, 1749020, 2098824, 2623530, 2998320, 3498040, 4197648, 5247060, 6996080, 10494120, 20988240]

約数ペア:

[(1, 20988240), (2, 10494120), (3, 6996080), (4, 5247060), (5, 4197648), (6, 3498040), (7, 2998320), (8, 2623530), (10, 2098824), (12, 1749020), (13, 1614480), (14, 1499160), (15, 1399216), (16, 1311765), (20, 1049412), (21, 999440), (24, 874510), (26, 807240), (28, 749580), (30, 699608), (31, 677040), (35, 599664), (39, 538160), (40, 524706), (42, 499720), (48, 437255), (52, 403620), (56, 374790), (60, 349804), (62, 338520), (65, 322896), (70, 299832), (78, 269080), (80, 262353), (84, 249860), (91, 230640), (93, 225680), (104, 201810), (105, 199888), (112, 187395), (120, 174902), (124, 169260), (130, 161448), (140, 149916), (155, 135408), (156, 134540), (168, 124930), (182, 115320), (186, 112840), (195, 107632), (208, 100905), (210, 99944), (217, 96720), (240, 87451), (248, 84630), (260, 80724), (273, 76880), (280, 74958), (310, 67704), (312, 67270), (336, 62465), (364, 57660), (372, 56420), (390, 53816), (403, 52080), (420, 49972), (434, 48360), (455, 46128), (465, 45136), (496, 42315), (520, 40362), (546, 38440), (560, 37479), (620, 33852), (624, 33635), (651, 32240), (728, 28830), (744, 28210), (780, 26908), (806, 26040), (840, 24986), (868, 24180), (910, 23064), (930, 22568), (961, 21840), (1040, 20181), (1085, 19344), (1092, 19220), (1209, 17360), (1240, 16926), (1302, 16120), (1365, 15376), (1456, 14415), (1488, 14105), (1560, 13454), (1612, 13020), (1680, 12493), (1736, 12090), (1820, 11532), (1860, 11284), (1922, 10920), (2015, 10416), (2170, 9672), (2184, 9610), (2418, 8680), (2480, 8463), (2604, 8060), (2730, 7688), (2821, 7440), (2883, 7280), (3120, 6727), (3224, 6510), (3255, 6448), (3472, 6045), (3640, 5766), (3720, 5642), (3844, 5460), (4030, 5208), (4340, 4836), (4368, 4805)]