19991360

素因数分解:

$2^6\times 5^1\times {\mathrm{62473}}^1$

素因数の和:62490

約数の個数: 28

約数和(自身を含む): 47605188

約数和(自身を除く): 27613828

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 62473, 124946, 249892, 312365, 499784, 624730, 999568, 1249460, 1999136, 2498920, 3998272, 4997840, 9995680, 19991360]

約数ペア:

[(1, 19991360), (2, 9995680), (4, 4997840), (5, 3998272), (8, 2498920), (10, 1999136), (16, 1249460), (20, 999568), (32, 624730), (40, 499784), (64, 312365), (80, 249892), (160, 124946), (320, 62473)]