21107080

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3361}}^1$

素因数の和:3529

約数の個数: 32

約数和(自身を含む): 47807640

約数和(自身を除く): 26700560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3361, 6280, 6722, 13444, 16805, 26888, 33610, 67220, 134440, 527677, 1055354, 2110708, 2638385, 4221416, 5276770, 10553540, 21107080]

約数ペア:

[(1, 21107080), (2, 10553540), (4, 5276770), (5, 4221416), (8, 2638385), (10, 2110708), (20, 1055354), (40, 527677), (157, 134440), (314, 67220), (628, 33610), (785, 26888), (1256, 16805), (1570, 13444), (3140, 6722), (3361, 6280)]