388620725

素因数分解:

$5^2\times {\mathrm{89}}^1\times {\mathrm{389}}^1\times {\mathrm{449}}^1$

素因数の和:937

約数の個数: 24

約数和(自身を含む): 489645000

約数和(自身を除く): 101024275

約数列:

[1, 5, 25, 89, 389, 445, 449, 1945, 2225, 2245, 9725, 11225, 34621, 39961, 173105, 174661, 199805, 865525, 873305, 999025, 4366525, 15544829, 77724145, 388620725]

約数ペア:

[(1, 388620725), (5, 77724145), (25, 15544829), (89, 4366525), (389, 999025), (445, 873305), (449, 865525), (1945, 199805), (2225, 174661), (2245, 173105), (9725, 39961), (11225, 34621)]