21105825

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{21647}}^1$

素因数の和:21673

約数の個数: 24

約数和(自身を含む): 37580928

約数和(自身を除く): 16475103

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975, 21647, 64941, 108235, 281411, 324705, 541175, 844233, 1407055, 1623525, 4221165, 7035275, 21105825]

約数ペア:

[(1, 21105825), (3, 7035275), (5, 4221165), (13, 1623525), (15, 1407055), (25, 844233), (39, 541175), (65, 324705), (75, 281411), (195, 108235), (325, 64941), (975, 21647)]