20498991

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{3557}}^1$

素因数の和:3690

約数の個数: 16

約数和(自身を含む): 29204064

約数和(自身を除く): 8705073

約数列:

[1, 3, 17, 51, 113, 339, 1921, 3557, 5763, 10671, 60469, 181407, 401941, 1205823, 6832997, 20498991]

約数ペア:

[(1, 20498991), (3, 6832997), (17, 1205823), (51, 401941), (113, 181407), (339, 60469), (1921, 10671), (3557, 5763)]