21090921

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{1481}}^1$

素因数の和:1632

約数の個数: 16

約数和(自身を含む): 29023488

約数和(自身を除く): 7932567

約数列:

[1, 3, 47, 101, 141, 303, 1481, 4443, 4747, 14241, 69607, 149581, 208821, 448743, 7030307, 21090921]

約数ペア:

[(1, 21090921), (3, 7030307), (47, 448743), (101, 208821), (141, 149581), (303, 69607), (1481, 14241), (4443, 4747)]