21398572

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{5209}}^1$

素因数の和:5305

約数の個数: 24

約数和(自身を含む): 40846400

約数和(自身を除く): 19447828

約数列:

[1, 2, 4, 13, 26, 52, 79, 158, 316, 1027, 2054, 4108, 5209, 10418, 20836, 67717, 135434, 270868, 411511, 823022, 1646044, 5349643, 10699286, 21398572]

約数ペア:

[(1, 21398572), (2, 10699286), (4, 5349643), (13, 1646044), (26, 823022), (52, 411511), (79, 270868), (158, 135434), (316, 67717), (1027, 20836), (2054, 10418), (4108, 5209)]