18919240

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{1979}}^1$

素因数の和:2229

約数の個数: 32

約数和(自身を含む): 42768000

約数和(自身を除く): 23848760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 478, 956, 1195, 1912, 1979, 2390, 3958, 4780, 7916, 9560, 9895, 15832, 19790, 39580, 79160, 472981, 945962, 1891924, 2364905, 3783848, 4729810, 9459620, 18919240]

約数ペア:

[(1, 18919240), (2, 9459620), (4, 4729810), (5, 3783848), (8, 2364905), (10, 1891924), (20, 945962), (40, 472981), (239, 79160), (478, 39580), (956, 19790), (1195, 15832), (1912, 9895), (1979, 9560), (2390, 7916), (3958, 4780)]