21085225

素因数分解:

$5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1697}}^1$

素因数の和:1785

約数の個数: 24

約数和(自身を含む): 30319488

約数和(自身を除く): 9234263

約数列:

[1, 5, 7, 25, 35, 71, 175, 355, 497, 1697, 1775, 2485, 8485, 11879, 12425, 42425, 59395, 120487, 296975, 602435, 843409, 3012175, 4217045, 21085225]

約数ペア:

[(1, 21085225), (5, 4217045), (7, 3012175), (25, 843409), (35, 602435), (71, 296975), (175, 120487), (355, 59395), (497, 42425), (1697, 12425), (1775, 11879), (2485, 8485)]