28169620

素因数分解:

$2^2\times 5^1\times {\mathrm{1091}}^1\times {\mathrm{1291}}^1$

素因数の和:2391

約数の個数: 24

約数和(自身を含む): 59256288

約数和(自身を除く): 31086668

約数列:

[1, 2, 4, 5, 10, 20, 1091, 1291, 2182, 2582, 4364, 5164, 5455, 6455, 10910, 12910, 21820, 25820, 1408481, 2816962, 5633924, 7042405, 14084810, 28169620]

約数ペア:

[(1, 28169620), (2, 14084810), (4, 7042405), (5, 5633924), (10, 2816962), (20, 1408481), (1091, 25820), (1291, 21820), (2182, 12910), (2582, 10910), (4364, 6455), (5164, 5455)]