218957980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{138581}}^1$

素因数の和:138669

約数の個数: 24

約数和(自身を含む): 465635520

約数和(自身を除く): 246677540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 138581, 277162, 554324, 692905, 1385810, 2771620, 10947899, 21895798, 43791596, 54739495, 109478990, 218957980]

約数ペア:

[(1, 218957980), (2, 109478990), (4, 54739495), (5, 43791596), (10, 21895798), (20, 10947899), (79, 2771620), (158, 1385810), (316, 692905), (395, 554324), (790, 277162), (1580, 138581)]