21071715

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28669}}^1$

素因数の和:28691

約数の個数: 24

約数和(自身を含む): 39220560

約数和(自身を除く): 18148845

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28669, 86007, 143345, 200683, 430035, 602049, 1003415, 1404781, 3010245, 4214343, 7023905, 21071715]

約数ペア:

[(1, 21071715), (3, 7023905), (5, 4214343), (7, 3010245), (15, 1404781), (21, 1003415), (35, 602049), (49, 430035), (105, 200683), (147, 143345), (245, 86007), (735, 28669)]