21191025

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{9743}}^1$

素因数の和:9785

約数の個数: 24

約数和(自身を含む): 36247680

約数和(自身を除く): 15056655

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 145, 435, 725, 2175, 9743, 29229, 48715, 146145, 243575, 282547, 730725, 847641, 1412735, 4238205, 7063675, 21191025]

約数ペア:

[(1, 21191025), (3, 7063675), (5, 4238205), (15, 1412735), (25, 847641), (29, 730725), (75, 282547), (87, 243575), (145, 146145), (435, 48715), (725, 29229), (2175, 9743)]