21891016

素因数分解:

$2^3\times 7^1\times {\mathrm{331}}^1\times {\mathrm{1181}}^1$

素因数の和:1525

約数の個数: 32

約数和(自身を含む): 47090880

約数和(自身を除く): 25199864

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 331, 662, 1181, 1324, 2317, 2362, 2648, 4634, 4724, 8267, 9268, 9448, 16534, 18536, 33068, 66136, 390911, 781822, 1563644, 2736377, 3127288, 5472754, 10945508, 21891016]

約数ペア:

[(1, 21891016), (2, 10945508), (4, 5472754), (7, 3127288), (8, 2736377), (14, 1563644), (28, 781822), (56, 390911), (331, 66136), (662, 33068), (1181, 18536), (1324, 16534), (2317, 9448), (2362, 9268), (2648, 8267), (4634, 4724)]