20408775

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{6637}}^1$

素因数の和:6691

約数の個数: 24

約数和(自身を含む): 34570704

約数和(自身を除く): 14161929

約数列:

[1, 3, 5, 15, 25, 41, 75, 123, 205, 615, 1025, 3075, 6637, 19911, 33185, 99555, 165925, 272117, 497775, 816351, 1360585, 4081755, 6802925, 20408775]

約数ペア:

[(1, 20408775), (3, 6802925), (5, 4081755), (15, 1360585), (25, 816351), (41, 497775), (75, 272117), (123, 165925), (205, 99555), (615, 33185), (1025, 19911), (3075, 6637)]