21212375

素因数分解:

$5^3\times {\mathrm{41}}^1\times {\mathrm{4139}}^1$

素因数の和:4195

約数の個数: 16

約数和(自身を含む): 27125280

約数和(自身を除く): 5912905

約数列:

[1, 5, 25, 41, 125, 205, 1025, 4139, 5125, 20695, 103475, 169699, 517375, 848495, 4242475, 21212375]

約数ペア:

[(1, 21212375), (5, 4242475), (25, 848495), (41, 517375), (125, 169699), (205, 103475), (1025, 20695), (4139, 5125)]