18660440

素因数分解:

$2^3\times 5^1\times {\mathrm{449}}^1\times {\mathrm{1039}}^1$

素因数の和:1499

約数の個数: 32

約数和(自身を含む): 42120000

約数和(自身を除く): 23459560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 449, 898, 1039, 1796, 2078, 2245, 3592, 4156, 4490, 5195, 8312, 8980, 10390, 17960, 20780, 41560, 466511, 933022, 1866044, 2332555, 3732088, 4665110, 9330220, 18660440]

約数ペア:

[(1, 18660440), (2, 9330220), (4, 4665110), (5, 3732088), (8, 2332555), (10, 1866044), (20, 933022), (40, 466511), (449, 41560), (898, 20780), (1039, 17960), (1796, 10390), (2078, 8980), (2245, 8312), (3592, 5195), (4156, 4490)]