19899880

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1$

素因数の和:120

約数の個数: 192

約数和(自身を含む): 62052480

約数和(自身を除く): 42152600

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 26, 28, 35, 40, 44, 49, 52, 55, 56, 65, 70, 71, 77, 88, 91, 98, 104, 110, 130, 140, 142, 143, 154, 182, 196, 220, 245, 260, 280, 284, 286, 308, 355, 364, 385, 392, 440, 455, 490, 497, 520, 539, 568, 572, 616, 637, 710, 715, 728, 770, 781, 910, 923, 980, 994, 1001, 1078, 1144, 1274, 1420, 1430, 1540, 1562, 1820, 1846, 1960, 1988, 2002, 2156, 2485, 2548, 2695, 2840, 2860, 3080, 3124, 3185, 3479, 3640, 3692, 3905, 3976, 4004, 4312, 4615, 4970, 5005, 5096, 5390, 5467, 5720, 6248, 6370, 6461, 6958, 7007, 7384, 7810, 8008, 9230, 9940, 10010, 10153, 10780, 10934, 12740, 12922, 13916, 14014, 15620, 17395, 18460, 19880, 20020, 20306, 21560, 21868, 25480, 25844, 27335, 27832, 28028, 31240, 32305, 34790, 35035, 36920, 38269, 40040, 40612, 43736, 45227, 50765, 51688, 54670, 56056, 64610, 69580, 70070, 71071, 76538, 81224, 90454, 101530, 109340, 129220, 139160, 140140, 142142, 153076, 180908, 191345, 203060, 218680, 226135, 258440, 280280, 284284, 306152, 355355, 361816, 382690, 406120, 452270, 497497, 568568, 710710, 765380, 904540, 994994, 1421420, 1530760, 1809080, 1989988, 2487485, 2842840, 3979976, 4974970, 9949940, 19899880]

約数ペア:

[(1, 19899880), (2, 9949940), (4, 4974970), (5, 3979976), (7, 2842840), (8, 2487485), (10, 1989988), (11, 1809080), (13, 1530760), (14, 1421420), (20, 994994), (22, 904540), (26, 765380), (28, 710710), (35, 568568), (40, 497497), (44, 452270), (49, 406120), (52, 382690), (55, 361816), (56, 355355), (65, 306152), (70, 284284), (71, 280280), (77, 258440), (88, 226135), (91, 218680), (98, 203060), (104, 191345), (110, 180908), (130, 153076), (140, 142142), (142, 140140), (143, 139160), (154, 129220), (182, 109340), (196, 101530), (220, 90454), (245, 81224), (260, 76538), (280, 71071), (284, 70070), (286, 69580), (308, 64610), (355, 56056), (364, 54670), (385, 51688), (392, 50765), (440, 45227), (455, 43736), (490, 40612), (497, 40040), (520, 38269), (539, 36920), (568, 35035), (572, 34790), (616, 32305), (637, 31240), (710, 28028), (715, 27832), (728, 27335), (770, 25844), (781, 25480), (910, 21868), (923, 21560), (980, 20306), (994, 20020), (1001, 19880), (1078, 18460), (1144, 17395), (1274, 15620), (1420, 14014), (1430, 13916), (1540, 12922), (1562, 12740), (1820, 10934), (1846, 10780), (1960, 10153), (1988, 10010), (2002, 9940), (2156, 9230), (2485, 8008), (2548, 7810), (2695, 7384), (2840, 7007), (2860, 6958), (3080, 6461), (3124, 6370), (3185, 6248), (3479, 5720), (3640, 5467), (3692, 5390), (3905, 5096), (3976, 5005), (4004, 4970), (4312, 4615)]