20803905

素因数分解:

$3^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{2111}}^1$

素因数の和:2198

約数の個数: 32

約数和(自身を含む): 37509120

約数和(自身を除く): 16705215

約数列:

[1, 3, 5, 9, 15, 27, 45, 73, 135, 219, 365, 657, 1095, 1971, 2111, 3285, 6333, 9855, 10555, 18999, 31665, 56997, 94995, 154103, 284985, 462309, 770515, 1386927, 2311545, 4160781, 6934635, 20803905]

約数ペア:

[(1, 20803905), (3, 6934635), (5, 4160781), (9, 2311545), (15, 1386927), (27, 770515), (45, 462309), (73, 284985), (135, 154103), (219, 94995), (365, 56997), (657, 31665), (1095, 18999), (1971, 10555), (2111, 9855), (3285, 6333)]