21908165

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{281}}^1\times {\mathrm{503}}^1$

素因数の和:820

約数の個数: 16

約数和(自身を含む): 27288576

約数和(自身を除く): 5380411

約数列:

[1, 5, 31, 155, 281, 503, 1405, 2515, 8711, 15593, 43555, 77965, 141343, 706715, 4381633, 21908165]

約数ペア:

[(1, 21908165), (5, 4381633), (31, 706715), (155, 141343), (281, 77965), (503, 43555), (1405, 15593), (2515, 8711)]