21241425

素因数分解:

$3^1\times 5^2\times {\mathrm{71}}^1\times {\mathrm{3989}}^1$

素因数の和:4073

約数の個数: 24

約数和(自身を含む): 35622720

約数和(自身を除く): 14381295

約数列:

[1, 3, 5, 15, 25, 71, 75, 213, 355, 1065, 1775, 3989, 5325, 11967, 19945, 59835, 99725, 283219, 299175, 849657, 1416095, 4248285, 7080475, 21241425]

約数ペア:

[(1, 21241425), (3, 7080475), (5, 4248285), (15, 1416095), (25, 849657), (71, 299175), (75, 283219), (213, 99725), (355, 59835), (1065, 19945), (1775, 11967), (3989, 5325)]