20821356

素因数分解:

$2^2\times 3^2\times {\mathrm{578371}}^1$

素因数の和:578381

約数の個数: 18

約数和(自身を含む): 52631852

約数和(自身を除く): 31810496

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 578371, 1156742, 1735113, 2313484, 3470226, 5205339, 6940452, 10410678, 20821356]

約数ペア:

[(1, 20821356), (2, 10410678), (3, 6940452), (4, 5205339), (6, 3470226), (9, 2313484), (12, 1735113), (18, 1156742), (36, 578371)]