20008724720

素因数分解:

$2^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{973187}}^1$

素因数の和:973457

約数の個数: 40

約数和(自身を含む): 46701345744

約数和(自身を除く): 26692621024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257, 514, 1028, 1285, 2056, 2570, 4112, 5140, 10280, 20560, 973187, 1946374, 3892748, 4865935, 7785496, 9731870, 15570992, 19463740, 38927480, 77854960, 250109059, 500218118, 1000436236, 1250545295, 2000872472, 2501090590, 4001744944, 5002181180, 10004362360, 20008724720]

約数ペア:

[(1, 20008724720), (2, 10004362360), (4, 5002181180), (5, 4001744944), (8, 2501090590), (10, 2000872472), (16, 1250545295), (20, 1000436236), (40, 500218118), (80, 250109059), (257, 77854960), (514, 38927480), (1028, 19463740), (1285, 15570992), (2056, 9731870), (2570, 7785496), (4112, 4865935), (5140, 3892748), (10280, 1946374), (20560, 973187)]