21399825

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{9839}}^1$

素因数の和:9881

約数の個数: 24

約数和(自身を含む): 36604800

約数和(自身を除く): 15204975

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 145, 435, 725, 2175, 9839, 29517, 49195, 147585, 245975, 285331, 737925, 855993, 1426655, 4279965, 7133275, 21399825]

約数ペア:

[(1, 21399825), (3, 7133275), (5, 4279965), (15, 1426655), (25, 855993), (29, 737925), (75, 285331), (87, 245975), (145, 147585), (435, 49195), (725, 29517), (2175, 9839)]