20939830

素因数分解:

$2^1\times 5^1\times {\mathrm{991}}^1\times {\mathrm{2113}}^1$

素因数の和:3111

約数の個数: 16

約数和(自身を含む): 37747584

約数和(自身を除く): 16807754

約数列:

[1, 2, 5, 10, 991, 1982, 2113, 4226, 4955, 9910, 10565, 21130, 2093983, 4187966, 10469915, 20939830]

約数ペア:

[(1, 20939830), (2, 10469915), (5, 4187966), (10, 2093983), (991, 21130), (1982, 10565), (2113, 9910), (4226, 4955)]