20668660

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12451}}^1$

素因数の和:12543

約数の個数: 24

約数和(自身を含む): 43930656

約数和(自身を除く): 23261996

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12451, 24902, 49804, 62255, 124510, 249020, 1033433, 2066866, 4133732, 5167165, 10334330, 20668660]

約数ペア:

[(1, 20668660), (2, 10334330), (4, 5167165), (5, 4133732), (10, 2066866), (20, 1033433), (83, 249020), (166, 124510), (332, 62255), (415, 49804), (830, 24902), (1660, 12451)]