2180780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:474

約数の個数: 48

約数和(自身を含む): 5388096

約数和(自身を除く): 3207316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 421, 518, 740, 842, 1036, 1295, 1684, 2105, 2590, 2947, 4210, 5180, 5894, 8420, 11788, 14735, 15577, 29470, 31154, 58940, 62308, 77885, 109039, 155770, 218078, 311540, 436156, 545195, 1090390, 2180780]

約数ペア:

[(1, 2180780), (2, 1090390), (4, 545195), (5, 436156), (7, 311540), (10, 218078), (14, 155770), (20, 109039), (28, 77885), (35, 62308), (37, 58940), (70, 31154), (74, 29470), (140, 15577), (148, 14735), (185, 11788), (259, 8420), (370, 5894), (421, 5180), (518, 4210), (740, 2947), (842, 2590), (1036, 2105), (1295, 1684)]