20786380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{2879}}^1$

素因数の和:2926

約数の個数: 36

約数和(自身を含む): 46085760

約数和(自身を除く): 25299380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 722, 1444, 1805, 2879, 3610, 5758, 7220, 11516, 14395, 28790, 54701, 57580, 109402, 218804, 273505, 547010, 1039319, 1094020, 2078638, 4157276, 5196595, 10393190, 20786380]

約数ペア:

[(1, 20786380), (2, 10393190), (4, 5196595), (5, 4157276), (10, 2078638), (19, 1094020), (20, 1039319), (38, 547010), (76, 273505), (95, 218804), (190, 109402), (361, 57580), (380, 54701), (722, 28790), (1444, 14395), (1805, 11516), (2879, 7220), (3610, 5758)]