21098390

素因数分解:

$2^1\times 5^1\times {\mathrm{991}}^1\times {\mathrm{2129}}^1$

素因数の和:3127

約数の個数: 16

約数和(自身を含む): 38033280

約数和(自身を除く): 16934890

約数列:

[1, 2, 5, 10, 991, 1982, 2129, 4258, 4955, 9910, 10645, 21290, 2109839, 4219678, 10549195, 21098390]

約数ペア:

[(1, 21098390), (2, 10549195), (5, 4219678), (10, 2109839), (991, 21290), (1982, 10645), (2129, 9910), (4258, 4955)]