21124225

素因数分解:

$5^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{557}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 27607608

約数和(自身を除く): 6483383

約数列:

[1, 5, 25, 37, 41, 185, 205, 557, 925, 1025, 1517, 2785, 7585, 13925, 20609, 22837, 37925, 103045, 114185, 515225, 570925, 844969, 4224845, 21124225]

約数ペア:

[(1, 21124225), (5, 4224845), (25, 844969), (37, 570925), (41, 515225), (185, 114185), (205, 103045), (557, 37925), (925, 22837), (1025, 20609), (1517, 13925), (2785, 7585)]