20860720

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2437}}^1$

素因数の和:2557

約数の個数: 40

約数和(自身を含む): 48974544

約数和(自身を除く): 28113824

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2437, 4280, 4874, 8560, 9748, 12185, 19496, 24370, 38992, 48740, 97480, 194960, 260759, 521518, 1043036, 1303795, 2086072, 2607590, 4172144, 5215180, 10430360, 20860720]

約数ペア:

[(1, 20860720), (2, 10430360), (4, 5215180), (5, 4172144), (8, 2607590), (10, 2086072), (16, 1303795), (20, 1043036), (40, 521518), (80, 260759), (107, 194960), (214, 97480), (428, 48740), (535, 38992), (856, 24370), (1070, 19496), (1712, 12185), (2140, 9748), (2437, 8560), (4280, 4874)]