21005005

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{113}}^2$

素因数の和:285

約数の個数: 24

約数和(自身を含む): 29682432

約数和(自身を除く): 8677427

約数列:

[1, 5, 7, 35, 47, 113, 235, 329, 565, 791, 1645, 3955, 5311, 12769, 26555, 37177, 63845, 89383, 185885, 446915, 600143, 3000715, 4201001, 21005005]

約数ペア:

[(1, 21005005), (5, 4201001), (7, 3000715), (35, 600143), (47, 446915), (113, 185885), (235, 89383), (329, 63845), (565, 37177), (791, 26555), (1645, 12769), (3955, 5311)]