280858475

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{20389}}^1$

素因数の和:20447

約数の個数: 24

約数和(自身を含む): 379254000

約数和(自身を除く): 98395525

約数列:

[1, 5, 19, 25, 29, 95, 145, 475, 551, 725, 2755, 13775, 20389, 101945, 387391, 509725, 591281, 1936955, 2956405, 9684775, 11234339, 14782025, 56171695, 280858475]

約数ペア:

[(1, 280858475), (5, 56171695), (19, 14782025), (25, 11234339), (29, 9684775), (95, 2956405), (145, 1936955), (475, 591281), (551, 509725), (725, 387391), (2755, 101945), (13775, 20389)]