19765525

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{997}}^1$

素因数の和:1081

約数の個数: 24

約数和(自身を含む): 26854184

約数和(自身を除く): 7088659

約数列:

[1, 5, 13, 25, 61, 65, 305, 325, 793, 997, 1525, 3965, 4985, 12961, 19825, 24925, 60817, 64805, 304085, 324025, 790621, 1520425, 3953105, 19765525]

約数ペア:

[(1, 19765525), (5, 3953105), (13, 1520425), (25, 790621), (61, 324025), (65, 304085), (305, 64805), (325, 60817), (793, 24925), (997, 19825), (1525, 12961), (3965, 4985)]