21297825

素因数分解:

$3^2\times 5^2\times {\mathrm{103}}^1\times {\mathrm{919}}^1$

素因数の和:1038

約数の個数: 36

約数和(自身を含む): 38559040

約数和(自身を除く): 17261215

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 103, 225, 309, 515, 919, 927, 1545, 2575, 2757, 4595, 4635, 7725, 8271, 13785, 22975, 23175, 41355, 68925, 94657, 206775, 283971, 473285, 851913, 1419855, 2366425, 4259565, 7099275, 21297825]

約数ペア:

[(1, 21297825), (3, 7099275), (5, 4259565), (9, 2366425), (15, 1419855), (25, 851913), (45, 473285), (75, 283971), (103, 206775), (225, 94657), (309, 68925), (515, 41355), (919, 23175), (927, 22975), (1545, 13785), (2575, 8271), (2757, 7725), (4595, 4635)]