20493680

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{2267}}^1$

素因数の和:2393

約数の個数: 40

約数和(自身を含む): 48090672

約数和(自身を除く): 27596992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 2267, 4520, 4534, 9040, 9068, 11335, 18136, 22670, 36272, 45340, 90680, 181360, 256171, 512342, 1024684, 1280855, 2049368, 2561710, 4098736, 5123420, 10246840, 20493680]

約数ペア:

[(1, 20493680), (2, 10246840), (4, 5123420), (5, 4098736), (8, 2561710), (10, 2049368), (16, 1280855), (20, 1024684), (40, 512342), (80, 256171), (113, 181360), (226, 90680), (452, 45340), (565, 36272), (904, 22670), (1130, 18136), (1808, 11335), (2260, 9068), (2267, 9040), (4520, 4534)]