21291125

素因数分解:

$5^3\times {\mathrm{71}}^1\times {\mathrm{2399}}^1$

素因数の和:2485

約数の個数: 16

約数和(自身を含む): 26956800

約数和(自身を除く): 5665675

約数列:

[1, 5, 25, 71, 125, 355, 1775, 2399, 8875, 11995, 59975, 170329, 299875, 851645, 4258225, 21291125]

約数ペア:

[(1, 21291125), (5, 4258225), (25, 851645), (71, 299875), (125, 170329), (355, 59975), (1775, 11995), (2399, 8875)]