64990120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{124981}}^1$

素因数の和:125005

約数の個数: 32

約数和(自身を含む): 157477320

約数和(自身を除く): 92487200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 124981, 249962, 499924, 624905, 999848, 1249810, 1624753, 2499620, 3249506, 4999240, 6499012, 8123765, 12998024, 16247530, 32495060, 64990120]

約数ペア:

[(1, 64990120), (2, 32495060), (4, 16247530), (5, 12998024), (8, 8123765), (10, 6499012), (13, 4999240), (20, 3249506), (26, 2499620), (40, 1624753), (52, 1249810), (65, 999848), (104, 624905), (130, 499924), (260, 249962), (520, 124981)]