21210175

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{6379}}^1$

素因数の和:6415

約数の個数: 24

約数和(自身を含む): 31644800

約数和(自身を除く): 10434625

約数列:

[1, 5, 7, 19, 25, 35, 95, 133, 175, 475, 665, 3325, 6379, 31895, 44653, 121201, 159475, 223265, 606005, 848407, 1116325, 3030025, 4242035, 21210175]

約数ペア:

[(1, 21210175), (5, 4242035), (7, 3030025), (19, 1116325), (25, 848407), (35, 606005), (95, 223265), (133, 159475), (175, 121201), (475, 44653), (665, 31895), (3325, 6379)]