20879901

素因数分解:

$3^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{2111}}^1$

素因数の和:2281

約数の個数: 24

約数和(自身を含む): 34704384

約数和(自身を除く): 13824483

約数列:

[1, 3, 7, 9, 21, 63, 157, 471, 1099, 1413, 2111, 3297, 6333, 9891, 14777, 18999, 44331, 132993, 331427, 994281, 2319989, 2982843, 6959967, 20879901]

約数ペア:

[(1, 20879901), (3, 6959967), (7, 2982843), (9, 2319989), (21, 994281), (63, 331427), (157, 132993), (471, 44331), (1099, 18999), (1413, 14777), (2111, 9891), (3297, 6333)]