81135880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{289771}}^1$

素因数の和:289789

約数の個数: 32

約数和(自身を含む): 208635840

約数和(自身を除く): 127499960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 289771, 579542, 1159084, 1448855, 2028397, 2318168, 2897710, 4056794, 5795420, 8113588, 10141985, 11590840, 16227176, 20283970, 40567940, 81135880]

約数ペア:

[(1, 81135880), (2, 40567940), (4, 20283970), (5, 16227176), (7, 11590840), (8, 10141985), (10, 8113588), (14, 5795420), (20, 4056794), (28, 2897710), (35, 2318168), (40, 2028397), (56, 1448855), (70, 1159084), (140, 579542), (280, 289771)]