20318480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2791}}^1$

素因数の和:2824

約数の個数: 80

約数和(自身を含む): 58162944

約数和(自身を除く): 37844464

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2791, 3640, 5582, 7280, 11164, 13955, 19537, 22328, 27910, 36283, 39074, 44656, 55820, 72566, 78148, 97685, 111640, 145132, 156296, 181415, 195370, 223280, 253981, 290264, 312592, 362830, 390740, 507962, 580528, 725660, 781480, 1015924, 1269905, 1451320, 1562960, 2031848, 2539810, 2902640, 4063696, 5079620, 10159240, 20318480]

約数ペア:

[(1, 20318480), (2, 10159240), (4, 5079620), (5, 4063696), (7, 2902640), (8, 2539810), (10, 2031848), (13, 1562960), (14, 1451320), (16, 1269905), (20, 1015924), (26, 781480), (28, 725660), (35, 580528), (40, 507962), (52, 390740), (56, 362830), (65, 312592), (70, 290264), (80, 253981), (91, 223280), (104, 195370), (112, 181415), (130, 156296), (140, 145132), (182, 111640), (208, 97685), (260, 78148), (280, 72566), (364, 55820), (455, 44656), (520, 39074), (560, 36283), (728, 27910), (910, 22328), (1040, 19537), (1456, 13955), (1820, 11164), (2791, 7280), (3640, 5582)]