204060280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{124427}}^1$

素因数の和:124479

約数の個数: 32

約数和(自身を含む): 470337840

約数和(自身を除く): 266277560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 124427, 248854, 497708, 622135, 995416, 1244270, 2488540, 4977080, 5101507, 10203014, 20406028, 25507535, 40812056, 51015070, 102030140, 204060280]

約数ペア:

[(1, 204060280), (2, 102030140), (4, 51015070), (5, 40812056), (8, 25507535), (10, 20406028), (20, 10203014), (40, 5101507), (41, 4977080), (82, 2488540), (164, 1244270), (205, 995416), (328, 622135), (410, 497708), (820, 248854), (1640, 124427)]