19987902

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^2$

素因数の和:166

約数の個数: 72

約数和(自身を含む): 49715640

約数和(自身を除く): 29727738

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 29, 33, 58, 59, 66, 87, 99, 118, 174, 177, 198, 261, 319, 354, 522, 531, 638, 649, 957, 1062, 1298, 1711, 1914, 1947, 2871, 3422, 3481, 3894, 5133, 5742, 5841, 6962, 10266, 10443, 11682, 15399, 18821, 20886, 30798, 31329, 37642, 38291, 56463, 62658, 76582, 100949, 112926, 114873, 169389, 201898, 229746, 302847, 338778, 344619, 605694, 689238, 908541, 1110439, 1817082, 2220878, 3331317, 6662634, 9993951, 19987902]

約数ペア:

[(1, 19987902), (2, 9993951), (3, 6662634), (6, 3331317), (9, 2220878), (11, 1817082), (18, 1110439), (22, 908541), (29, 689238), (33, 605694), (58, 344619), (59, 338778), (66, 302847), (87, 229746), (99, 201898), (118, 169389), (174, 114873), (177, 112926), (198, 100949), (261, 76582), (319, 62658), (354, 56463), (522, 38291), (531, 37642), (638, 31329), (649, 30798), (957, 20886), (1062, 18821), (1298, 15399), (1711, 11682), (1914, 10443), (1947, 10266), (2871, 6962), (3422, 5841), (3481, 5742), (3894, 5133)]