20389995

素因数分解:

$3^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{2069}}^1$

素因数の和:2156

約数の個数: 32

約数和(自身を含む): 36763200

約数和(自身を除く): 16373205

約数列:

[1, 3, 5, 9, 15, 27, 45, 73, 135, 219, 365, 657, 1095, 1971, 2069, 3285, 6207, 9855, 10345, 18621, 31035, 55863, 93105, 151037, 279315, 453111, 755185, 1359333, 2265555, 4077999, 6796665, 20389995]

約数ペア:

[(1, 20389995), (3, 6796665), (5, 4077999), (9, 2265555), (15, 1359333), (27, 755185), (45, 453111), (73, 279315), (135, 151037), (219, 93105), (365, 55863), (657, 31035), (1095, 18621), (1971, 10345), (2069, 9855), (3285, 6207)]