21220796

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{279221}}^1$

素因数の和:279244

約数の個数: 12

約数和(自身を含む): 39091080

約数和(自身を除く): 17870284

約数列:

[1, 2, 4, 19, 38, 76, 279221, 558442, 1116884, 5305199, 10610398, 21220796]

約数ペア:

[(1, 21220796), (2, 10610398), (4, 5305199), (19, 1116884), (38, 558442), (76, 279221)]