21352425

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16747}}^1$

素因数の和:16777

約数の個数: 24

約数和(自身を含む): 37381536

約数和(自身を除く): 16029111

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16747, 50241, 83735, 251205, 284699, 418675, 854097, 1256025, 1423495, 4270485, 7117475, 21352425]

約数ペア:

[(1, 21352425), (3, 7117475), (5, 4270485), (15, 1423495), (17, 1256025), (25, 854097), (51, 418675), (75, 284699), (85, 251205), (255, 83735), (425, 50241), (1275, 16747)]