20989269

素因数分解:

$3^2\times 7^1\times {\mathrm{431}}^1\times {\mathrm{773}}^1$

素因数の和:1217

約数の個数: 24

約数和(自身を含む): 34774272

約数和(自身を除く): 13785003

約数列:

[1, 3, 7, 9, 21, 63, 431, 773, 1293, 2319, 3017, 3879, 5411, 6957, 9051, 16233, 27153, 48699, 333163, 999489, 2332141, 2998467, 6996423, 20989269]

約数ペア:

[(1, 20989269), (3, 6996423), (7, 2998467), (9, 2332141), (21, 999489), (63, 333163), (431, 48699), (773, 27153), (1293, 16233), (2319, 9051), (3017, 6957), (3879, 5411)]