20718645

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{523}}^1$

素因数の和:689

約数の個数: 32

約数和(自身を含む): 35212800

約数和(自身を除く): 14494155

約数列:

[1, 3, 5, 15, 19, 57, 95, 139, 285, 417, 523, 695, 1569, 2085, 2615, 2641, 7845, 7923, 9937, 13205, 29811, 39615, 49685, 72697, 149055, 218091, 363485, 1090455, 1381243, 4143729, 6906215, 20718645]

約数ペア:

[(1, 20718645), (3, 6906215), (5, 4143729), (15, 1381243), (19, 1090455), (57, 363485), (95, 218091), (139, 149055), (285, 72697), (417, 49685), (523, 39615), (695, 29811), (1569, 13205), (2085, 9937), (2615, 7923), (2641, 7845)]