28971725

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{449}}^1$

素因数の和:577

約数の個数: 24

約数和(自身を含む): 37665000

約数和(自身を除く): 8693275

約数列:

[1, 5, 25, 29, 89, 145, 445, 449, 725, 2225, 2245, 2581, 11225, 12905, 13021, 39961, 64525, 65105, 199805, 325525, 999025, 1158869, 5794345, 28971725]

約数ペア:

[(1, 28971725), (5, 5794345), (25, 1158869), (29, 999025), (89, 325525), (145, 199805), (445, 65105), (449, 64525), (725, 39961), (2225, 13021), (2245, 12905), (2581, 11225)]