21215375

素因数分解:

$5^3\times {\mathrm{89}}^1\times {\mathrm{1907}}^1$

素因数の和:2011

約数の個数: 16

約数和(自身を含む): 26788320

約数和(自身を除く): 5572945

約数列:

[1, 5, 25, 89, 125, 445, 1907, 2225, 9535, 11125, 47675, 169723, 238375, 848615, 4243075, 21215375]

約数ペア:

[(1, 21215375), (5, 4243075), (25, 848615), (89, 238375), (125, 169723), (445, 47675), (1907, 11125), (2225, 9535)]