21851851

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{3907}}^1$

素因数の和:3978

約数の個数: 16

約数和(自身を含む): 27012096

約数和(自身を除く): 5160245

約数列:

[1, 7, 17, 47, 119, 329, 799, 3907, 5593, 27349, 66419, 183629, 464933, 1285403, 3121693, 21851851]

約数ペア:

[(1, 21851851), (7, 3121693), (17, 1285403), (47, 464933), (119, 183629), (329, 66419), (799, 27349), (3907, 5593)]