21033820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1\times {\mathrm{227}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 45849888

約数和(自身を除く): 24816068

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 113, 164, 205, 226, 227, 410, 452, 454, 565, 820, 908, 1130, 1135, 2260, 2270, 4540, 4633, 9266, 9307, 18532, 18614, 23165, 25651, 37228, 46330, 46535, 51302, 92660, 93070, 102604, 128255, 186140, 256510, 513020, 1051691, 2103382, 4206764, 5258455, 10516910, 21033820]

約数ペア:

[(1, 21033820), (2, 10516910), (4, 5258455), (5, 4206764), (10, 2103382), (20, 1051691), (41, 513020), (82, 256510), (113, 186140), (164, 128255), (205, 102604), (226, 93070), (227, 92660), (410, 51302), (452, 46535), (454, 46330), (565, 37228), (820, 25651), (908, 23165), (1130, 18614), (1135, 18532), (2260, 9307), (2270, 9266), (4540, 4633)]