21272615

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6679}}^1$

素因数の和:6711

約数の個数: 24

約数和(自身を含む): 31983840

約数和(自身を除く): 10711225

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6679, 33395, 46753, 86827, 233765, 327271, 434135, 607789, 1636355, 3038945, 4254523, 21272615]

約数ペア:

[(1, 21272615), (5, 4254523), (7, 3038945), (13, 1636355), (35, 607789), (49, 434135), (65, 327271), (91, 233765), (245, 86827), (455, 46753), (637, 33395), (3185, 6679)]