21139916

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12377}}^1$

素因数の和:12449

約数の個数: 24

約数和(自身を含む): 42976416

約数和(自身を除く): 21836500

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12377, 24754, 49508, 86639, 173278, 346556, 754997, 1509994, 3019988, 5284979, 10569958, 21139916]

約数ペア:

[(1, 21139916), (2, 10569958), (4, 5284979), (7, 3019988), (14, 1509994), (28, 754997), (61, 346556), (122, 173278), (244, 86639), (427, 49508), (854, 24754), (1708, 12377)]