20813480

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{11071}}^1$

素因数の和:11129

約数の個数: 32

約数和(自身を含む): 47831040

約数和(自身を除く): 27017560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 11071, 22142, 44284, 55355, 88568, 110710, 221420, 442840, 520337, 1040674, 2081348, 2601685, 4162696, 5203370, 10406740, 20813480]

約数ペア:

[(1, 20813480), (2, 10406740), (4, 5203370), (5, 4162696), (8, 2601685), (10, 2081348), (20, 1040674), (40, 520337), (47, 442840), (94, 221420), (188, 110710), (235, 88568), (376, 55355), (470, 44284), (940, 22142), (1880, 11071)]