21581356

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{271}}^1\times {\mathrm{463}}^1$

素因数の和:781

約数の個数: 24

約数和(自身を含む): 38872064

約数和(自身を除く): 17290708

約数列:

[1, 2, 4, 43, 86, 172, 271, 463, 542, 926, 1084, 1852, 11653, 19909, 23306, 39818, 46612, 79636, 125473, 250946, 501892, 5395339, 10790678, 21581356]

約数ペア:

[(1, 21581356), (2, 10790678), (4, 5395339), (43, 501892), (86, 250946), (172, 125473), (271, 79636), (463, 46612), (542, 39818), (926, 23306), (1084, 19909), (1852, 11653)]