21489260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82651}}^1$

素因数の和:82673

約数の個数: 24

約数和(自身を含む): 48599376

約数和(自身を除く): 27110116

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82651, 165302, 330604, 413255, 826510, 1074463, 1653020, 2148926, 4297852, 5372315, 10744630, 21489260]

約数ペア:

[(1, 21489260), (2, 10744630), (4, 5372315), (5, 4297852), (10, 2148926), (13, 1653020), (20, 1074463), (26, 826510), (52, 413255), (65, 330604), (130, 165302), (260, 82651)]