19998987

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{271}}^1\times {\mathrm{1447}}^1$

素因数の和:1738

約数の個数: 16

約数和(自身を含む): 28357632

約数和(自身を除く): 8358645

約数列:

[1, 3, 17, 51, 271, 813, 1447, 4341, 4607, 13821, 24599, 73797, 392137, 1176411, 6666329, 19998987]

約数ペア:

[(1, 19998987), (3, 6666329), (17, 1176411), (51, 392137), (271, 73797), (813, 24599), (1447, 13821), (4341, 4607)]