21420665

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^2\times {\mathrm{331}}^1$

素因数の和:429

約数の個数: 24

約数和(自身を含む): 30166848

約数和(自身を除く): 8746183

約数列:

[1, 5, 7, 35, 43, 215, 301, 331, 1505, 1655, 1849, 2317, 9245, 11585, 12943, 14233, 64715, 71165, 99631, 498155, 612019, 3060095, 4284133, 21420665]

約数ペア:

[(1, 21420665), (5, 4284133), (7, 3060095), (35, 612019), (43, 498155), (215, 99631), (301, 71165), (331, 64715), (1505, 14233), (1655, 12943), (1849, 11585), (2317, 9245)]