18977348

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{419}}^1$

素因数の和:516

約数の個数: 36

約数和(自身を含む): 36585360

約数和(自身を除く): 17608012

約数列:

[1, 2, 4, 13, 26, 52, 67, 134, 169, 268, 338, 419, 676, 838, 871, 1676, 1742, 3484, 5447, 10894, 11323, 21788, 22646, 28073, 45292, 56146, 70811, 112292, 141622, 283244, 364949, 729898, 1459796, 4744337, 9488674, 18977348]

約数ペア:

[(1, 18977348), (2, 9488674), (4, 4744337), (13, 1459796), (26, 729898), (52, 364949), (67, 283244), (134, 141622), (169, 112292), (268, 70811), (338, 56146), (419, 45292), (676, 28073), (838, 22646), (871, 21788), (1676, 11323), (1742, 10894), (3484, 5447)]