21250255

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19231}}^1$

素因数の和:19266

約数の個数: 16

約数和(自身を含む): 29078784

約数和(自身を除く): 7828529

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19231, 96155, 250003, 326927, 1250015, 1634635, 4250051, 21250255]

約数ペア:

[(1, 21250255), (5, 4250051), (13, 1634635), (17, 1250015), (65, 326927), (85, 250003), (221, 96155), (1105, 19231)]