21287428

素因数分解:

$2^2\times {\mathrm{47}}^1\times {\mathrm{199}}^1\times {\mathrm{569}}^1$

素因数の和:819

約数の個数: 24

約数和(自身を含む): 38304000

約数和(自身を除く): 17016572

約数列:

[1, 2, 4, 47, 94, 188, 199, 398, 569, 796, 1138, 2276, 9353, 18706, 26743, 37412, 53486, 106972, 113231, 226462, 452924, 5321857, 10643714, 21287428]

約数ペア:

[(1, 21287428), (2, 10643714), (4, 5321857), (47, 452924), (94, 226462), (188, 113231), (199, 106972), (398, 53486), (569, 37412), (796, 26743), (1138, 18706), (2276, 9353)]