21140875

素因数分解:

$5^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{653}}^1$

素因数の和:712

約数の個数: 32

約数和(自身を含む): 31015296

約数和(自身を除く): 9874421

約数列:

[1, 5, 7, 25, 35, 37, 125, 175, 185, 259, 653, 875, 925, 1295, 3265, 4571, 4625, 6475, 16325, 22855, 24161, 32375, 81625, 114275, 120805, 169127, 571375, 604025, 845635, 3020125, 4228175, 21140875]

約数ペア:

[(1, 21140875), (5, 4228175), (7, 3020125), (25, 845635), (35, 604025), (37, 571375), (125, 169127), (175, 120805), (185, 114275), (259, 81625), (653, 32375), (875, 24161), (925, 22855), (1295, 16325), (3265, 6475), (4571, 4625)]