21150717

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{163}}^1\times {\mathrm{167}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 33503232

約数和(自身を除く): 12352515

約数列:

[1, 3, 7, 21, 37, 111, 163, 167, 259, 489, 501, 777, 1141, 1169, 3423, 3507, 6031, 6179, 18093, 18537, 27221, 42217, 43253, 81663, 126651, 129759, 190547, 571641, 1007177, 3021531, 7050239, 21150717]

約数ペア:

[(1, 21150717), (3, 7050239), (7, 3021531), (21, 1007177), (37, 571641), (111, 190547), (163, 129759), (167, 126651), (259, 81663), (489, 43253), (501, 42217), (777, 27221), (1141, 18537), (1169, 18093), (3423, 6179), (3507, 6031)]