20728251

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{20749}}^1$

素因数の和:20795

約数の個数: 16

約数和(自身を含む): 31540000

約数和(自身を除く): 10811749

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 20749, 62247, 186741, 560223, 767713, 2303139, 6909417, 20728251]

約数ペア:

[(1, 20728251), (3, 6909417), (9, 2303139), (27, 767713), (37, 560223), (111, 186741), (333, 62247), (999, 20749)]