19023820

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{137}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 41313888

約数和(自身を除く): 22290068

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 131, 137, 212, 262, 265, 274, 524, 530, 548, 655, 685, 1060, 1310, 1370, 2620, 2740, 6943, 7261, 13886, 14522, 17947, 27772, 29044, 34715, 35894, 36305, 69430, 71788, 72610, 89735, 138860, 145220, 179470, 358940, 951191, 1902382, 3804764, 4755955, 9511910, 19023820]

約数ペア:

[(1, 19023820), (2, 9511910), (4, 4755955), (5, 3804764), (10, 1902382), (20, 951191), (53, 358940), (106, 179470), (131, 145220), (137, 138860), (212, 89735), (262, 72610), (265, 71788), (274, 69430), (524, 36305), (530, 35894), (548, 34715), (655, 29044), (685, 27772), (1060, 17947), (1310, 14522), (1370, 13886), (2620, 7261), (2740, 6943)]