19936240

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{137}}^1$

素因数の和:274

約数の個数: 80

約数和(自身を含む): 49898592

約数和(自身を除く): 29962352

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 107, 136, 137, 170, 214, 272, 274, 340, 428, 535, 548, 680, 685, 856, 1070, 1096, 1360, 1370, 1712, 1819, 2140, 2192, 2329, 2740, 3638, 4280, 4658, 5480, 7276, 8560, 9095, 9316, 10960, 11645, 14552, 14659, 18190, 18632, 23290, 29104, 29318, 36380, 37264, 46580, 58636, 72760, 73295, 93160, 117272, 145520, 146590, 186320, 234544, 249203, 293180, 498406, 586360, 996812, 1172720, 1246015, 1993624, 2492030, 3987248, 4984060, 9968120, 19936240]

約数ペア:

[(1, 19936240), (2, 9968120), (4, 4984060), (5, 3987248), (8, 2492030), (10, 1993624), (16, 1246015), (17, 1172720), (20, 996812), (34, 586360), (40, 498406), (68, 293180), (80, 249203), (85, 234544), (107, 186320), (136, 146590), (137, 145520), (170, 117272), (214, 93160), (272, 73295), (274, 72760), (340, 58636), (428, 46580), (535, 37264), (548, 36380), (680, 29318), (685, 29104), (856, 23290), (1070, 18632), (1096, 18190), (1360, 14659), (1370, 14552), (1712, 11645), (1819, 10960), (2140, 9316), (2192, 9095), (2329, 8560), (2740, 7276), (3638, 5480), (4280, 4658)]