21292505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{10567}}^1$

素因数の和:10616

約数の個数: 16

約数和(自身を含む): 28406784

約数和(自身を除く): 7114279

約数列:

[1, 5, 13, 31, 65, 155, 403, 2015, 10567, 52835, 137371, 327577, 686855, 1637885, 4258501, 21292505]

約数ペア:

[(1, 21292505), (5, 4258501), (13, 1637885), (31, 686855), (65, 327577), (155, 137371), (403, 52835), (2015, 10567)]