21578956

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{18797}}^1$

素因数の和:18849

約数の個数: 24

約数和(自身を含む): 44212896

約数和(自身を除く): 22633940

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 18797, 37594, 75188, 131579, 263158, 526316, 770677, 1541354, 3082708, 5394739, 10789478, 21578956]

約数ペア:

[(1, 21578956), (2, 10789478), (4, 5394739), (7, 3082708), (14, 1541354), (28, 770677), (41, 526316), (82, 263158), (164, 131579), (287, 75188), (574, 37594), (1148, 18797)]