20815305

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{198241}}^1$

素因数の和:198256

約数の個数: 16

約数和(自身を含む): 38062464

約数和(自身を除く): 17247159

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 198241, 594723, 991205, 1387687, 2973615, 4163061, 6938435, 20815305]

約数ペア:

[(1, 20815305), (3, 6938435), (5, 4163061), (7, 2973615), (15, 1387687), (21, 991205), (35, 594723), (105, 198241)]