19968280

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{9419}}^1$

素因数の和:9483

約数の個数: 32

約数和(自身を含む): 45781200

約数和(自身を除く): 25812920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 9419, 18838, 37676, 47095, 75352, 94190, 188380, 376760, 499207, 998414, 1996828, 2496035, 3993656, 4992070, 9984140, 19968280]

約数ペア:

[(1, 19968280), (2, 9984140), (4, 4992070), (5, 3993656), (8, 2496035), (10, 1996828), (20, 998414), (40, 499207), (53, 376760), (106, 188380), (212, 94190), (265, 75352), (424, 47095), (530, 37676), (1060, 18838), (2120, 9419)]