21226712

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3851}}^1$

素因数の和:3923

約数の個数: 32

約数和(自身を含む): 43681680

約数和(自身を除く): 22454968

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 104, 106, 212, 424, 689, 1378, 2756, 3851, 5512, 7702, 15404, 30808, 50063, 100126, 200252, 204103, 400504, 408206, 816412, 1632824, 2653339, 5306678, 10613356, 21226712]

約数ペア:

[(1, 21226712), (2, 10613356), (4, 5306678), (8, 2653339), (13, 1632824), (26, 816412), (52, 408206), (53, 400504), (104, 204103), (106, 200252), (212, 100126), (424, 50063), (689, 30808), (1378, 15404), (2756, 7702), (3851, 5512)]