21190225

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{6373}}^1$

素因数の和:6409

約数の個数: 24

約数和(自身を含む): 31615040

約数和(自身を除く): 10424815

約数列:

[1, 5, 7, 19, 25, 35, 95, 133, 175, 475, 665, 3325, 6373, 31865, 44611, 121087, 159325, 223055, 605435, 847609, 1115275, 3027175, 4238045, 21190225]

約数ペア:

[(1, 21190225), (5, 4238045), (7, 3027175), (19, 1115275), (25, 847609), (35, 605435), (95, 223055), (133, 159325), (175, 121087), (475, 44611), (665, 31865), (3325, 6373)]