20638780

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12433}}^1$

素因数の和:12525

約数の個数: 24

約数和(自身を含む): 43867152

約数和(自身を除く): 23228372

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12433, 24866, 49732, 62165, 124330, 248660, 1031939, 2063878, 4127756, 5159695, 10319390, 20638780]

約数ペア:

[(1, 20638780), (2, 10319390), (4, 5159695), (5, 4127756), (10, 2063878), (20, 1031939), (83, 248660), (166, 124330), (332, 62165), (415, 49732), (830, 24866), (1660, 12433)]