21871075

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{311}}^1$

素因数の和:447

約数の個数: 24

約数和(自身を含む): 28435680

約数和(自身を除く): 6564605

約数列:

[1, 5, 25, 29, 97, 145, 311, 485, 725, 1555, 2425, 2813, 7775, 9019, 14065, 30167, 45095, 70325, 150835, 225475, 754175, 874843, 4374215, 21871075]

約数ペア:

[(1, 21871075), (5, 4374215), (25, 874843), (29, 754175), (97, 225475), (145, 150835), (311, 70325), (485, 45095), (725, 30167), (1555, 14065), (2425, 9019), (2813, 7775)]