21739160

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3967}}^1$

素因数の和:4115

約数の個数: 32

約数和(自身を含む): 49282560

約数和(自身を除く): 27543400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3967, 5480, 7934, 15868, 19835, 31736, 39670, 79340, 158680, 543479, 1086958, 2173916, 2717395, 4347832, 5434790, 10869580, 21739160]

約数ペア:

[(1, 21739160), (2, 10869580), (4, 5434790), (5, 4347832), (8, 2717395), (10, 2173916), (20, 1086958), (40, 543479), (137, 158680), (274, 79340), (548, 39670), (685, 31736), (1096, 19835), (1370, 15868), (2740, 7934), (3967, 5480)]