20621665

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1\times {\mathrm{571}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 25698816

約数和(自身を除く): 5077151

約数列:

[1, 5, 31, 155, 233, 571, 1165, 2855, 7223, 17701, 36115, 88505, 133043, 665215, 4124333, 20621665]

約数ペア:

[(1, 20621665), (5, 4124333), (31, 665215), (155, 133043), (233, 88505), (571, 36115), (1165, 17701), (2855, 7223)]