21031409

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{313}}^1\times {\mathrm{331}}^1$

素因数の和:680

約数の個数: 16

約数和(自身を含む): 25019520

約数和(自身を除く): 3988111

約数列:

[1, 7, 29, 203, 313, 331, 2191, 2317, 9077, 9599, 63539, 67193, 103603, 725221, 3004487, 21031409]

約数ペア:

[(1, 21031409), (7, 3004487), (29, 725221), (203, 103603), (313, 67193), (331, 63539), (2191, 9599), (2317, 9077)]