20789020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{911}}^1$

素因数の和:1090

約数の個数: 48

約数和(自身を含む): 50254848

約数和(自身を除く): 29465828

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 163, 326, 652, 815, 911, 1141, 1630, 1822, 2282, 3260, 3644, 4555, 4564, 5705, 6377, 9110, 11410, 12754, 18220, 22820, 25508, 31885, 63770, 127540, 148493, 296986, 593972, 742465, 1039451, 1484930, 2078902, 2969860, 4157804, 5197255, 10394510, 20789020]

約数ペア:

[(1, 20789020), (2, 10394510), (4, 5197255), (5, 4157804), (7, 2969860), (10, 2078902), (14, 1484930), (20, 1039451), (28, 742465), (35, 593972), (70, 296986), (140, 148493), (163, 127540), (326, 63770), (652, 31885), (815, 25508), (911, 22820), (1141, 18220), (1630, 12754), (1822, 11410), (2282, 9110), (3260, 6377), (3644, 5705), (4555, 4564)]