20802640

素因数分解:

$2^4\times 5^1\times {\mathrm{457}}^1\times {\mathrm{569}}^1$

素因数の和:1039

約数の個数: 40

約数和(自身を含む): 48557160

約数和(自身を除く): 27754520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 457, 569, 914, 1138, 1828, 2276, 2285, 2845, 3656, 4552, 4570, 5690, 7312, 9104, 9140, 11380, 18280, 22760, 36560, 45520, 260033, 520066, 1040132, 1300165, 2080264, 2600330, 4160528, 5200660, 10401320, 20802640]

約数ペア:

[(1, 20802640), (2, 10401320), (4, 5200660), (5, 4160528), (8, 2600330), (10, 2080264), (16, 1300165), (20, 1040132), (40, 520066), (80, 260033), (457, 45520), (569, 36560), (914, 22760), (1138, 18280), (1828, 11380), (2276, 9140), (2285, 9104), (2845, 7312), (3656, 5690), (4552, 4570)]