20864907

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17431}}^1$

素因数の和:17463

約数の個数: 24

約数和(自身を含む): 36258560

約数和(自身を除く): 15393653

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17431, 52293, 122017, 156879, 331189, 366051, 993567, 1098153, 2318323, 2980701, 6954969, 20864907]

約数ペア:

[(1, 20864907), (3, 6954969), (7, 2980701), (9, 2318323), (19, 1098153), (21, 993567), (57, 366051), (63, 331189), (133, 156879), (171, 122017), (399, 52293), (1197, 17431)]