420123280

素因数分解:

$2^4\times 5^1\times {\mathrm{5251541}}^1$

素因数の和:5251554

約数の個数: 20

約数和(自身を含む): 976786812

約数和(自身を除く): 556663532

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5251541, 10503082, 21006164, 26257705, 42012328, 52515410, 84024656, 105030820, 210061640, 420123280]

約数ペア:

[(1, 420123280), (2, 210061640), (4, 105030820), (5, 84024656), (8, 52515410), (10, 42012328), (16, 26257705), (20, 21006164), (40, 10503082), (80, 5251541)]