20391357

素因数分解:

$3^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{11699}}^1$

素因数の和:11792

約数の個数: 16

約数和(自身を含む): 31449600

約数和(自身を除く): 11058243

約数列:

[1, 3, 7, 21, 83, 249, 581, 1743, 11699, 35097, 81893, 245679, 971017, 2913051, 6797119, 20391357]

約数ペア:

[(1, 20391357), (3, 6797119), (7, 2913051), (21, 971017), (83, 245679), (249, 81893), (581, 35097), (1743, 11699)]