21813913

素因数分解:

${\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1\times {\mathrm{571}}^1$

素因数の和:756

約数の個数: 16

約数和(自身を含む): 25039872

約数和(自身を除く): 3225959

約数列:

[1, 11, 23, 151, 253, 571, 1661, 3473, 6281, 13133, 38203, 86221, 144463, 948431, 1983083, 21813913]

約数ペア:

[(1, 21813913), (11, 1983083), (23, 948431), (151, 144463), (253, 86221), (571, 38203), (1661, 13133), (3473, 6281)]