25518580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{521}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 56125440

約数和(自身を除く): 30606860

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 79, 124, 155, 158, 310, 316, 395, 521, 620, 790, 1042, 1580, 2084, 2449, 2605, 4898, 5210, 9796, 10420, 12245, 16151, 24490, 32302, 41159, 48980, 64604, 80755, 82318, 161510, 164636, 205795, 323020, 411590, 823180, 1275929, 2551858, 5103716, 6379645, 12759290, 25518580]

約数ペア:

[(1, 25518580), (2, 12759290), (4, 6379645), (5, 5103716), (10, 2551858), (20, 1275929), (31, 823180), (62, 411590), (79, 323020), (124, 205795), (155, 164636), (158, 161510), (310, 82318), (316, 80755), (395, 64604), (521, 48980), (620, 41159), (790, 32302), (1042, 24490), (1580, 16151), (2084, 12245), (2449, 10420), (2605, 9796), (4898, 5210)]