7978803

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{19997}}^1$

素因数の和:20026

約数の個数: 16

約数和(自身を含む): 12798720

約数和(自身を除く): 4819917

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 19997, 59991, 139979, 379943, 419937, 1139829, 2659601, 7978803]

約数ペア:

[(1, 7978803), (3, 2659601), (7, 1139829), (19, 419937), (21, 379943), (57, 139979), (133, 59991), (399, 19997)]