21376780

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{4793}}^1$

素因数の和:5025

約数の個数: 24

約数和(自身を含む): 45101952

約数和(自身を除く): 23725172

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 4793, 9586, 19172, 23965, 47930, 95860, 1068839, 2137678, 4275356, 5344195, 10688390, 21376780]

約数ペア:

[(1, 21376780), (2, 10688390), (4, 5344195), (5, 4275356), (10, 2137678), (20, 1068839), (223, 95860), (446, 47930), (892, 23965), (1115, 19172), (2230, 9586), (4460, 4793)]