81811925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1811}}^1$

素因数の和:1973

約数の個数: 24

約数和(自身を含む): 110097120

約数和(自身を除く): 28285195

約数列:

[1, 5, 13, 25, 65, 139, 325, 695, 1807, 1811, 3475, 9035, 9055, 23543, 45175, 45275, 117715, 251729, 588575, 1258645, 3272477, 6293225, 16362385, 81811925]

約数ペア:

[(1, 81811925), (5, 16362385), (13, 6293225), (25, 3272477), (65, 1258645), (139, 588575), (325, 251729), (695, 117715), (1807, 45275), (1811, 45175), (3475, 23543), (9035, 9055)]