20533840

素因数分解:

$2^4\times 5^1\times {\mathrm{223}}^1\times {\mathrm{1151}}^1$

素因数の和:1387

約数の個数: 40

約数和(自身を含む): 47996928

約数和(自身を除く): 27463088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 223, 446, 892, 1115, 1151, 1784, 2230, 2302, 3568, 4460, 4604, 5755, 8920, 9208, 11510, 17840, 18416, 23020, 46040, 92080, 256673, 513346, 1026692, 1283365, 2053384, 2566730, 4106768, 5133460, 10266920, 20533840]

約数ペア:

[(1, 20533840), (2, 10266920), (4, 5133460), (5, 4106768), (8, 2566730), (10, 2053384), (16, 1283365), (20, 1026692), (40, 513346), (80, 256673), (223, 92080), (446, 46040), (892, 23020), (1115, 18416), (1151, 17840), (1784, 11510), (2230, 9208), (2302, 8920), (3568, 5755), (4460, 4604)]