20797970

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 42923520

約数和(自身を除く): 22125550

約数列:

[1, 2, 5, 10, 17, 19, 34, 38, 47, 85, 94, 95, 137, 170, 190, 235, 274, 323, 470, 646, 685, 799, 893, 1370, 1598, 1615, 1786, 2329, 2603, 3230, 3995, 4465, 4658, 5206, 6439, 7990, 8930, 11645, 12878, 13015, 15181, 23290, 26030, 30362, 32195, 44251, 64390, 75905, 88502, 109463, 122341, 151810, 218926, 221255, 244682, 442510, 547315, 611705, 1094630, 1223410, 2079797, 4159594, 10398985, 20797970]

約数ペア:

[(1, 20797970), (2, 10398985), (5, 4159594), (10, 2079797), (17, 1223410), (19, 1094630), (34, 611705), (38, 547315), (47, 442510), (85, 244682), (94, 221255), (95, 218926), (137, 151810), (170, 122341), (190, 109463), (235, 88502), (274, 75905), (323, 64390), (470, 44251), (646, 32195), (685, 30362), (799, 26030), (893, 23290), (1370, 15181), (1598, 13015), (1615, 12878), (1786, 11645), (2329, 8930), (2603, 7990), (3230, 6439), (3995, 5206), (4465, 4658)]