81289160

素因数分解:

$2^3\times 5^1\times {\mathrm{271}}^1\times {\mathrm{7499}}^1$

素因数の和:7781

約数の個数: 32

約数和(自身を含む): 183600000

約数和(自身を除く): 102310840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 271, 542, 1084, 1355, 2168, 2710, 5420, 7499, 10840, 14998, 29996, 37495, 59992, 74990, 149980, 299960, 2032229, 4064458, 8128916, 10161145, 16257832, 20322290, 40644580, 81289160]

約数ペア:

[(1, 81289160), (2, 40644580), (4, 20322290), (5, 16257832), (8, 10161145), (10, 8128916), (20, 4064458), (40, 2032229), (271, 299960), (542, 149980), (1084, 74990), (1355, 59992), (2168, 37495), (2710, 29996), (5420, 14998), (7499, 10840)]