21208825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{233}}^1\times {\mathrm{331}}^1$

素因数の和:585

約数の個数: 24

約数和(自身を含む): 28899936

約数和(自身を除く): 7691111

約数列:

[1, 5, 11, 25, 55, 233, 275, 331, 1165, 1655, 2563, 3641, 5825, 8275, 12815, 18205, 64075, 77123, 91025, 385615, 848353, 1928075, 4241765, 21208825]

約数ペア:

[(1, 21208825), (5, 4241765), (11, 1928075), (25, 848353), (55, 385615), (233, 91025), (275, 77123), (331, 64075), (1165, 18205), (1655, 12815), (2563, 8275), (3641, 5825)]