28668025

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:633

約数の個数: 24

約数和(自身を含む): 37283328

約数和(自身を除く): 8615303

約数列:

[1, 5, 25, 31, 71, 155, 355, 521, 775, 1775, 2201, 2605, 11005, 13025, 16151, 36991, 55025, 80755, 184955, 403775, 924775, 1146721, 5733605, 28668025]

約数ペア:

[(1, 28668025), (5, 5733605), (25, 1146721), (31, 924775), (71, 403775), (155, 184955), (355, 80755), (521, 55025), (775, 36991), (1775, 16151), (2201, 13025), (2605, 11005)]