428020420

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{270899}}^1$

素因数の和:270987

約数の個数: 24

約数和(自身を含む): 910224000

約数和(自身を除く): 482203580

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 270899, 541798, 1083596, 1354495, 2708990, 5417980, 21401021, 42802042, 85604084, 107005105, 214010210, 428020420]

約数ペア:

[(1, 428020420), (2, 214010210), (4, 107005105), (5, 85604084), (10, 42802042), (20, 21401021), (79, 5417980), (158, 2708990), (316, 1354495), (395, 1083596), (790, 541798), (1580, 270899)]