641639080

素因数分解:

$2^3\times 5^1\times {\mathrm{16040977}}^1$

素因数の和:16040988

約数の個数: 16

約数和(自身を含む): 1443688020

約数和(自身を除く): 802048940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 16040977, 32081954, 64163908, 80204885, 128327816, 160409770, 320819540, 641639080]

約数ペア:

[(1, 641639080), (2, 320819540), (4, 160409770), (5, 128327816), (8, 80204885), (10, 64163908), (20, 32081954), (40, 16040977)]