9780421

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{487}}^1$

素因数の和:664

約数の個数: 16

約数和(自身を含む): 11868160

約数和(自身を除く): 2087739

約数列:

[1, 7, 19, 133, 151, 487, 1057, 2869, 3409, 9253, 20083, 64771, 73537, 514759, 1397203, 9780421]

約数ペア:

[(1, 9780421), (7, 1397203), (19, 514759), (133, 73537), (151, 64771), (487, 20083), (1057, 9253), (2869, 3409)]