21717940

素因数分解:

$2^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{4007}}^1$

素因数の和:4287

約数の個数: 24

約数和(自身を含む): 45787392

約数和(自身を除く): 24069452

約数列:

[1, 2, 4, 5, 10, 20, 271, 542, 1084, 1355, 2710, 4007, 5420, 8014, 16028, 20035, 40070, 80140, 1085897, 2171794, 4343588, 5429485, 10858970, 21717940]

約数ペア:

[(1, 21717940), (2, 10858970), (4, 5429485), (5, 4343588), (10, 2171794), (20, 1085897), (271, 80140), (542, 40070), (1084, 20035), (1355, 16028), (2710, 8014), (4007, 5420)]