21212540

素因数分解:

$2^2\times 5^1\times {\mathrm{863}}^1\times {\mathrm{1229}}^1$

素因数の和:2101

約数の個数: 24

約数和(自身を含む): 44634240

約数和(自身を除く): 23421700

約数列:

[1, 2, 4, 5, 10, 20, 863, 1229, 1726, 2458, 3452, 4315, 4916, 6145, 8630, 12290, 17260, 24580, 1060627, 2121254, 4242508, 5303135, 10606270, 21212540]

約数ペア:

[(1, 21212540), (2, 10606270), (4, 5303135), (5, 4242508), (10, 2121254), (20, 1060627), (863, 24580), (1229, 17260), (1726, 12290), (2458, 8630), (3452, 6145), (4315, 4916)]