20317640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{487}}^1$

素因数の和:654

約数の個数: 64

約数和(自身を含む): 52704000

約数和(自身を除く): 32386360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 149, 280, 298, 487, 596, 745, 974, 1043, 1192, 1490, 1948, 2086, 2435, 2980, 3409, 3896, 4172, 4870, 5215, 5960, 6818, 8344, 9740, 10430, 13636, 17045, 19480, 20860, 27272, 34090, 41720, 68180, 72563, 136360, 145126, 290252, 362815, 507941, 580504, 725630, 1015882, 1451260, 2031764, 2539705, 2902520, 4063528, 5079410, 10158820, 20317640]

約数ペア:

[(1, 20317640), (2, 10158820), (4, 5079410), (5, 4063528), (7, 2902520), (8, 2539705), (10, 2031764), (14, 1451260), (20, 1015882), (28, 725630), (35, 580504), (40, 507941), (56, 362815), (70, 290252), (140, 145126), (149, 136360), (280, 72563), (298, 68180), (487, 41720), (596, 34090), (745, 27272), (974, 20860), (1043, 19480), (1192, 17045), (1490, 13636), (1948, 10430), (2086, 9740), (2435, 8344), (2980, 6818), (3409, 5960), (3896, 5215), (4172, 4870)]