20796020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{3623}}^1$

素因数の和:3680

約数の個数: 48

約数和(自身を含む): 51141888

約数和(自身を除く): 30345868

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 70, 82, 140, 164, 205, 287, 410, 574, 820, 1148, 1435, 2870, 3623, 5740, 7246, 14492, 18115, 25361, 36230, 50722, 72460, 101444, 126805, 148543, 253610, 297086, 507220, 594172, 742715, 1039801, 1485430, 2079602, 2970860, 4159204, 5199005, 10398010, 20796020]

約数ペア:

[(1, 20796020), (2, 10398010), (4, 5199005), (5, 4159204), (7, 2970860), (10, 2079602), (14, 1485430), (20, 1039801), (28, 742715), (35, 594172), (41, 507220), (70, 297086), (82, 253610), (140, 148543), (164, 126805), (205, 101444), (287, 72460), (410, 50722), (574, 36230), (820, 25361), (1148, 18115), (1435, 14492), (2870, 7246), (3623, 5740)]