20656520

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{5113}}^1$

素因数の和:5225

約数の個数: 32

約数和(自身を含む): 46946520

約数和(自身を除く): 26290000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 5113, 10226, 20452, 25565, 40904, 51130, 102260, 204520, 516413, 1032826, 2065652, 2582065, 4131304, 5164130, 10328260, 20656520]

約数ペア:

[(1, 20656520), (2, 10328260), (4, 5164130), (5, 4131304), (8, 2582065), (10, 2065652), (20, 1032826), (40, 516413), (101, 204520), (202, 102260), (404, 51130), (505, 40904), (808, 25565), (1010, 20452), (2020, 10226), (4040, 5113)]