20120380

素因数分解:

$2^2\times 5^1\times 7^4\times {\mathrm{419}}^1$

素因数の和:456

約数の個数: 60

約数和(自身を含む): 49409640

約数和(自身を除く): 29289260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 419, 490, 686, 838, 980, 1372, 1676, 1715, 2095, 2401, 2933, 3430, 4190, 4802, 5866, 6860, 8380, 9604, 11732, 12005, 14665, 20531, 24010, 29330, 41062, 48020, 58660, 82124, 102655, 143717, 205310, 287434, 410620, 574868, 718585, 1006019, 1437170, 2012038, 2874340, 4024076, 5030095, 10060190, 20120380]

約数ペア:

[(1, 20120380), (2, 10060190), (4, 5030095), (5, 4024076), (7, 2874340), (10, 2012038), (14, 1437170), (20, 1006019), (28, 718585), (35, 574868), (49, 410620), (70, 287434), (98, 205310), (140, 143717), (196, 102655), (245, 82124), (343, 58660), (419, 48020), (490, 41062), (686, 29330), (838, 24010), (980, 20531), (1372, 14665), (1676, 12005), (1715, 11732), (2095, 9604), (2401, 8380), (2933, 6860), (3430, 5866), (4190, 4802)]