21704221

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{251}}^1\times {\mathrm{1123}}^1$

素因数の和:1392

約数の個数: 16

約数和(自身を含む): 27191808

約数和(自身を除く): 5487587

約数列:

[1, 7, 11, 77, 251, 1123, 1757, 2761, 7861, 12353, 19327, 86471, 281873, 1973111, 3100603, 21704221]

約数ペア:

[(1, 21704221), (7, 3100603), (11, 1973111), (77, 281873), (251, 86471), (1123, 19327), (1757, 12353), (2761, 7861)]