21090475

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{6343}}^1$

素因数の和:6379

約数の個数: 24

約数和(自身を含む): 31466240

約数和(自身を除く): 10375765

約数列:

[1, 5, 7, 19, 25, 35, 95, 133, 175, 475, 665, 3325, 6343, 31715, 44401, 120517, 158575, 222005, 602585, 843619, 1110025, 3012925, 4218095, 21090475]

約数ペア:

[(1, 21090475), (5, 4218095), (7, 3012925), (19, 1110025), (25, 843619), (35, 602585), (95, 222005), (133, 158575), (175, 120517), (475, 44401), (665, 31715), (3325, 6343)]