19879504

素因数分解:

$2^4\times {\mathrm{509}}^1\times {\mathrm{2441}}^1$

素因数の和:2958

約数の個数: 20

約数和(自身を含む): 38608020

約数和(自身を除く): 18728516

約数列:

[1, 2, 4, 8, 16, 509, 1018, 2036, 2441, 4072, 4882, 8144, 9764, 19528, 39056, 1242469, 2484938, 4969876, 9939752, 19879504]

約数ペア:

[(1, 19879504), (2, 9939752), (4, 4969876), (8, 2484938), (16, 1242469), (509, 39056), (1018, 19528), (2036, 9764), (2441, 8144), (4072, 4882)]