20090718

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{257}}^1$

素因数の和:409

約数の個数: 48

約数和(自身を含む): 45158256

約数和(自身を除く): 25067538

約数列:

[1, 2, 3, 6, 9, 18, 43, 86, 101, 129, 202, 257, 258, 303, 387, 514, 606, 771, 774, 909, 1542, 1818, 2313, 4343, 4626, 8686, 11051, 13029, 22102, 25957, 26058, 33153, 39087, 51914, 66306, 77871, 78174, 99459, 155742, 198918, 233613, 467226, 1116151, 2232302, 3348453, 6696906, 10045359, 20090718]

約数ペア:

[(1, 20090718), (2, 10045359), (3, 6696906), (6, 3348453), (9, 2232302), (18, 1116151), (43, 467226), (86, 233613), (101, 198918), (129, 155742), (202, 99459), (257, 78174), (258, 77871), (303, 66306), (387, 51914), (514, 39087), (606, 33153), (771, 26058), (774, 25957), (909, 22102), (1542, 13029), (1818, 11051), (2313, 8686), (4343, 4626)]