20505142

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{491}}^1$

素因数の和:676

約数の個数: 32

約数和(自身を含む): 37313280

約数和(自身を除く): 16808138

約数列:

[1, 2, 7, 14, 19, 38, 133, 157, 266, 314, 491, 982, 1099, 2198, 2983, 3437, 5966, 6874, 9329, 18658, 20881, 41762, 65303, 77087, 130606, 154174, 539609, 1079218, 1464653, 2929306, 10252571, 20505142]

約数ペア:

[(1, 20505142), (2, 10252571), (7, 2929306), (14, 1464653), (19, 1079218), (38, 539609), (133, 154174), (157, 130606), (266, 77087), (314, 65303), (491, 41762), (982, 20881), (1099, 18658), (2198, 9329), (2983, 6874), (3437, 5966)]