256476760

素因数分解:

$2^3\times 5^1\times {\mathrm{223}}^1\times {\mathrm{28753}}^1$

素因数の和:28987

約数の個数: 32

約数和(自身を含む): 579680640

約数和(自身を除く): 323203880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 223, 446, 892, 1115, 1784, 2230, 4460, 8920, 28753, 57506, 115012, 143765, 230024, 287530, 575060, 1150120, 6411919, 12823838, 25647676, 32059595, 51295352, 64119190, 128238380, 256476760]

約数ペア:

[(1, 256476760), (2, 128238380), (4, 64119190), (5, 51295352), (8, 32059595), (10, 25647676), (20, 12823838), (40, 6411919), (223, 1150120), (446, 575060), (892, 287530), (1115, 230024), (1784, 143765), (2230, 115012), (4460, 57506), (8920, 28753)]