20881275

素因数分解:

$3^1\times 5^2\times {\mathrm{139}}^1\times {\mathrm{2003}}^1$

素因数の和:2155

約数の個数: 24

約数和(自身を含む): 34789440

約数和(自身を除く): 13908165

約数列:

[1, 3, 5, 15, 25, 75, 139, 417, 695, 2003, 2085, 3475, 6009, 10015, 10425, 30045, 50075, 150225, 278417, 835251, 1392085, 4176255, 6960425, 20881275]

約数ペア:

[(1, 20881275), (3, 6960425), (5, 4176255), (15, 1392085), (25, 835251), (75, 278417), (139, 150225), (417, 50075), (695, 30045), (2003, 10425), (2085, 10015), (3475, 6009)]