19871228

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{1453}}^1$

素因数の和:1733

約数の個数: 24

約数和(自身を含む): 37617888

約数和(自身を除く): 17746660

約数列:

[1, 2, 4, 13, 26, 52, 263, 526, 1052, 1453, 2906, 3419, 5812, 6838, 13676, 18889, 37778, 75556, 382139, 764278, 1528556, 4967807, 9935614, 19871228]

約数ペア:

[(1, 19871228), (2, 9935614), (4, 4967807), (13, 1528556), (26, 764278), (52, 382139), (263, 75556), (526, 37778), (1052, 18889), (1453, 13676), (2906, 6838), (3419, 5812)]