19997289

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{2551}}^1$

素因数の和:2637

約数の個数: 24

約数和(自身を含む): 31583552

約数和(自身を除く): 11586263

約数列:

[1, 3, 9, 13, 39, 67, 117, 201, 603, 871, 2551, 2613, 7653, 7839, 22959, 33163, 99489, 170917, 298467, 512751, 1538253, 2221921, 6665763, 19997289]

約数ペア:

[(1, 19997289), (3, 6665763), (9, 2221921), (13, 1538253), (39, 512751), (67, 298467), (117, 170917), (201, 99489), (603, 33163), (871, 22959), (2551, 7839), (2613, 7653)]