21988305

素因数分解:

$3^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{1103}}^1$

素因数の和:1557

約数の個数: 24

約数和(自身を含む): 38233728

約数和(自身を除く): 16245423

約数列:

[1, 3, 5, 9, 15, 45, 443, 1103, 1329, 2215, 3309, 3987, 5515, 6645, 9927, 16545, 19935, 49635, 488629, 1465887, 2443145, 4397661, 7329435, 21988305]

約数ペア:

[(1, 21988305), (3, 7329435), (5, 4397661), (9, 2443145), (15, 1465887), (45, 488629), (443, 49635), (1103, 19935), (1329, 16545), (2215, 9927), (3309, 6645), (3987, 5515)]