28838225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{997}}^1$

素因数の和:1109

約数の個数: 24

約数和(自身を含む): 38981880

約数和(自身を除く): 10143655

約数列:

[1, 5, 13, 25, 65, 89, 325, 445, 997, 1157, 2225, 4985, 5785, 12961, 24925, 28925, 64805, 88733, 324025, 443665, 1153529, 2218325, 5767645, 28838225]

約数ペア:

[(1, 28838225), (5, 5767645), (13, 2218325), (25, 1153529), (65, 443665), (89, 324025), (325, 88733), (445, 64805), (997, 28925), (1157, 24925), (2225, 12961), (4985, 5785)]