19719219

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{1201}}^1$

素因数の和:1638

約数の個数: 16

約数和(自身を含む): 28405664

約数和(自身を除く): 8686445

約数列:

[1, 3, 13, 39, 421, 1201, 1263, 3603, 5473, 15613, 16419, 46839, 505621, 1516863, 6573073, 19719219]

約数ペア:

[(1, 19719219), (3, 6573073), (13, 1516863), (39, 505621), (421, 46839), (1201, 16419), (1263, 15613), (3603, 5473)]