20397355

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 8114645

約数列:

[1, 5, 11, 19, 55, 95, 131, 149, 209, 655, 745, 1045, 1441, 1639, 2489, 2831, 7205, 8195, 12445, 14155, 19519, 27379, 31141, 97595, 136895, 155705, 214709, 370861, 1073545, 1854305, 4079471, 20397355]

約数ペア:

[(1, 20397355), (5, 4079471), (11, 1854305), (19, 1073545), (55, 370861), (95, 214709), (131, 155705), (149, 136895), (209, 97595), (655, 31141), (745, 27379), (1045, 19519), (1441, 14155), (1639, 12445), (2489, 8195), (2831, 7205)]