21859835

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1\times {\mathrm{443}}^1$

素因数の和:658

約数の個数: 16

約数和(自身を含む): 26853120

約数和(自身を除く): 4993285

約数列:

[1, 5, 71, 139, 355, 443, 695, 2215, 9869, 31453, 49345, 61577, 157265, 307885, 4371967, 21859835]

約数ペア:

[(1, 21859835), (5, 4371967), (71, 307885), (139, 157265), (355, 61577), (443, 49345), (695, 31453), (2215, 9869)]