20918821

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{2539}}^1$

素因数の和:2664

約数の個数: 16

約数和(自身を含む): 26334720

約数和(自身を除く): 5415899

約数列:

[1, 7, 11, 77, 107, 749, 1177, 2539, 8239, 17773, 27929, 195503, 271673, 1901711, 2988403, 20918821]

約数ペア:

[(1, 20918821), (7, 2988403), (11, 1901711), (77, 271673), (107, 195503), (749, 27929), (1177, 17773), (2539, 8239)]