19720560

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{127}}^1\times {\mathrm{647}}^1$

素因数の和:790

約数の個数: 80

約数和(自身を含む): 61710336

約数和(自身を除く): 41989776

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 127, 240, 254, 381, 508, 635, 647, 762, 1016, 1270, 1294, 1524, 1905, 1941, 2032, 2540, 2588, 3048, 3235, 3810, 3882, 5080, 5176, 6096, 6470, 7620, 7764, 9705, 10160, 10352, 12940, 15240, 15528, 19410, 25880, 30480, 31056, 38820, 51760, 77640, 82169, 155280, 164338, 246507, 328676, 410845, 493014, 657352, 821690, 986028, 1232535, 1314704, 1643380, 1972056, 2465070, 3286760, 3944112, 4930140, 6573520, 9860280, 19720560]

約数ペア:

[(1, 19720560), (2, 9860280), (3, 6573520), (4, 4930140), (5, 3944112), (6, 3286760), (8, 2465070), (10, 1972056), (12, 1643380), (15, 1314704), (16, 1232535), (20, 986028), (24, 821690), (30, 657352), (40, 493014), (48, 410845), (60, 328676), (80, 246507), (120, 164338), (127, 155280), (240, 82169), (254, 77640), (381, 51760), (508, 38820), (635, 31056), (647, 30480), (762, 25880), (1016, 19410), (1270, 15528), (1294, 15240), (1524, 12940), (1905, 10352), (1941, 10160), (2032, 9705), (2540, 7764), (2588, 7620), (3048, 6470), (3235, 6096), (3810, 5176), (3882, 5080)]