21011788

素因数分解:

$2^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:179

約数の個数: 72

約数和(自身を含む): 45964800

約数和(自身を除く): 24953012

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 49, 59, 79, 92, 98, 118, 158, 161, 196, 236, 316, 322, 413, 553, 644, 826, 1106, 1127, 1357, 1652, 1817, 2212, 2254, 2714, 2891, 3634, 3871, 4508, 4661, 5428, 5782, 7268, 7742, 9322, 9499, 11564, 12719, 15484, 18644, 18998, 25438, 32627, 37996, 50876, 65254, 66493, 89033, 107203, 130508, 132986, 178066, 214406, 228389, 265972, 356132, 428812, 456778, 750421, 913556, 1500842, 3001684, 5252947, 10505894, 21011788]

約数ペア:

[(1, 21011788), (2, 10505894), (4, 5252947), (7, 3001684), (14, 1500842), (23, 913556), (28, 750421), (46, 456778), (49, 428812), (59, 356132), (79, 265972), (92, 228389), (98, 214406), (118, 178066), (158, 132986), (161, 130508), (196, 107203), (236, 89033), (316, 66493), (322, 65254), (413, 50876), (553, 37996), (644, 32627), (826, 25438), (1106, 18998), (1127, 18644), (1357, 15484), (1652, 12719), (1817, 11564), (2212, 9499), (2254, 9322), (2714, 7742), (2891, 7268), (3634, 5782), (3871, 5428), (4508, 4661)]