28809718

素因数分解:

$2^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{19979}}^1$

素因数の和:20091

約数の個数: 16

約数和(自身を含む): 49870080

約数和(自身を除く): 21060362

約数列:

[1, 2, 7, 14, 103, 206, 721, 1442, 19979, 39958, 139853, 279706, 2057837, 4115674, 14404859, 28809718]

約数ペア:

[(1, 28809718), (2, 14404859), (7, 4115674), (14, 2057837), (103, 279706), (206, 139853), (721, 39958), (1442, 19979)]