20391177

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{487}}^1\times {\mathrm{821}}^1$

素因数の和:1328

約数の個数: 16

約数和(自身を含む): 28881792

約数和(自身を除く): 8490615

約数列:

[1, 3, 17, 51, 487, 821, 1461, 2463, 8279, 13957, 24837, 41871, 399827, 1199481, 6797059, 20391177]

約数ペア:

[(1, 20391177), (3, 6797059), (17, 1199481), (51, 399827), (487, 41871), (821, 24837), (1461, 13957), (2463, 8279)]