20809520

素因数分解:

$2^4\times 5^1\times {\mathrm{467}}^1\times {\mathrm{557}}^1$

素因数の和:1037

約数の個数: 40

約数和(自身を含む): 48572784

約数和(自身を除く): 27763264

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 467, 557, 934, 1114, 1868, 2228, 2335, 2785, 3736, 4456, 4670, 5570, 7472, 8912, 9340, 11140, 18680, 22280, 37360, 44560, 260119, 520238, 1040476, 1300595, 2080952, 2601190, 4161904, 5202380, 10404760, 20809520]

約数ペア:

[(1, 20809520), (2, 10404760), (4, 5202380), (5, 4161904), (8, 2601190), (10, 2080952), (16, 1300595), (20, 1040476), (40, 520238), (80, 260119), (467, 44560), (557, 37360), (934, 22280), (1114, 18680), (1868, 11140), (2228, 9340), (2335, 8912), (2785, 7472), (3736, 5570), (4456, 4670)]