21282860

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12821}}^1$

素因数の和:12913

約数の個数: 24

約数和(自身を含む): 45236016

約数和(自身を除く): 23953156

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12821, 25642, 51284, 64105, 128210, 256420, 1064143, 2128286, 4256572, 5320715, 10641430, 21282860]

約数ペア:

[(1, 21282860), (2, 10641430), (4, 5320715), (5, 4256572), (10, 2128286), (20, 1064143), (83, 256420), (166, 128210), (332, 64105), (415, 51284), (830, 25642), (1660, 12821)]