81342520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290509}}^1$

素因数の和:290527

約数の個数: 32

約数和(自身を含む): 209167200

約数和(自身を除く): 127824680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290509, 581018, 1162036, 1452545, 2033563, 2324072, 2905090, 4067126, 5810180, 8134252, 10167815, 11620360, 16268504, 20335630, 40671260, 81342520]

約数ペア:

[(1, 81342520), (2, 40671260), (4, 20335630), (5, 16268504), (7, 11620360), (8, 10167815), (10, 8134252), (14, 5810180), (20, 4067126), (28, 2905090), (35, 2324072), (40, 2033563), (56, 1452545), (70, 1162036), (140, 581018), (280, 290509)]