419994020

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{265819}}^1$

素因数の和:265907

約数の個数: 24

約数和(自身を含む): 893155200

約数和(自身を除く): 473161180

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 265819, 531638, 1063276, 1329095, 2658190, 5316380, 20999701, 41999402, 83998804, 104998505, 209997010, 419994020]

約数ペア:

[(1, 419994020), (2, 209997010), (4, 104998505), (5, 83998804), (10, 41999402), (20, 20999701), (79, 5316380), (158, 2658190), (316, 1329095), (395, 1063276), (790, 531638), (1580, 265819)]