21338075

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{2503}}^1$

素因数の和:2555

約数の個数: 24

約数和(自身を含む): 29807616

約数和(自身を除く): 8469541

約数列:

[1, 5, 11, 25, 31, 55, 155, 275, 341, 775, 1705, 2503, 8525, 12515, 27533, 62575, 77593, 137665, 387965, 688325, 853523, 1939825, 4267615, 21338075]

約数ペア:

[(1, 21338075), (5, 4267615), (11, 1939825), (25, 853523), (31, 688325), (55, 387965), (155, 137665), (275, 77593), (341, 62575), (775, 27533), (1705, 12515), (2503, 8525)]