21381704

素因数分解:

$2^3\times {\mathrm{1553}}^1\times {\mathrm{1721}}^1$

素因数の和:3280

約数の個数: 16

約数和(自身を含む): 40139820

約数和(自身を除く): 18758116

約数列:

[1, 2, 4, 8, 1553, 1721, 3106, 3442, 6212, 6884, 12424, 13768, 2672713, 5345426, 10690852, 21381704]

約数ペア:

[(1, 21381704), (2, 10690852), (4, 5345426), (8, 2672713), (1553, 13768), (1721, 12424), (3106, 6884), (3442, 6212)]