20986089

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{557}}^1\times {\mathrm{661}}^1$

素因数の和:1240

約数の個数: 16

約数和(自身を含む): 29551680

約数和(自身を除く): 8565591

約数列:

[1, 3, 19, 57, 557, 661, 1671, 1983, 10583, 12559, 31749, 37677, 368177, 1104531, 6995363, 20986089]

約数ペア:

[(1, 20986089), (3, 6995363), (19, 1104531), (57, 368177), (557, 37677), (661, 31749), (1671, 12559), (1983, 10583)]