21177793

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{4391}}^1$

素因数の和:4464

約数の個数: 16

約数和(自身を含む): 26562816

約数和(自身を除く): 5385023

約数列:

[1, 7, 13, 53, 91, 371, 689, 4391, 4823, 30737, 57083, 232723, 399581, 1629061, 3025399, 21177793]

約数ペア:

[(1, 21177793), (7, 3025399), (13, 1629061), (53, 399581), (91, 232723), (371, 57083), (689, 30737), (4391, 4823)]