20402120

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1609}}^1$

素因数の和:1937

約数の個数: 32

約数和(自身を含む): 46078200

約数和(自身を除く): 25676080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1585, 1609, 2536, 3170, 3218, 6340, 6436, 8045, 12680, 12872, 16090, 32180, 64360, 510053, 1020106, 2040212, 2550265, 4080424, 5100530, 10201060, 20402120]

約数ペア:

[(1, 20402120), (2, 10201060), (4, 5100530), (5, 4080424), (8, 2550265), (10, 2040212), (20, 1020106), (40, 510053), (317, 64360), (634, 32180), (1268, 16090), (1585, 12872), (1609, 12680), (2536, 8045), (3170, 6436), (3218, 6340)]