7971621

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{19979}}^1$

素因数の和:20008

約数の個数: 16

約数和(自身を含む): 12787200

約数和(自身を除く): 4815579

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 19979, 59937, 139853, 379601, 419559, 1138803, 2657207, 7971621]

約数ペア:

[(1, 7971621), (3, 2657207), (7, 1138803), (19, 419559), (21, 379601), (57, 139853), (133, 59937), (399, 19979)]