205820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{251}}^1$

素因数の和:301

約数の個数: 24

約数和(自身を含む): 444528

約数和(自身を除く): 238708

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 251, 410, 502, 820, 1004, 1255, 2510, 5020, 10291, 20582, 41164, 51455, 102910, 205820]

約数ペア:

[(1, 205820), (2, 102910), (4, 51455), (5, 41164), (10, 20582), (20, 10291), (41, 5020), (82, 2510), (164, 1255), (205, 1004), (251, 820), (410, 502)]