20819740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^2\times {\mathrm{563}}^1$

素因数の和:658

約数の個数: 36

約数和(自身を含む): 44841384

約数和(自身を除く): 24021644

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 563, 860, 1126, 1849, 2252, 2815, 3698, 5630, 7396, 9245, 11260, 18490, 24209, 36980, 48418, 96836, 121045, 242090, 484180, 1040987, 2081974, 4163948, 5204935, 10409870, 20819740]

約数ペア:

[(1, 20819740), (2, 10409870), (4, 5204935), (5, 4163948), (10, 2081974), (20, 1040987), (43, 484180), (86, 242090), (172, 121045), (215, 96836), (430, 48418), (563, 36980), (860, 24209), (1126, 18490), (1849, 11260), (2252, 9245), (2815, 7396), (3698, 5630)]