12780520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{7793}}^1$

素因数の和:7845

約数の個数: 32

約数和(自身を含む): 29461320

約数和(自身を除く): 16680800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 7793, 15586, 31172, 38965, 62344, 77930, 155860, 311720, 319513, 639026, 1278052, 1597565, 2556104, 3195130, 6390260, 12780520]

約数ペア:

[(1, 12780520), (2, 6390260), (4, 3195130), (5, 2556104), (8, 1597565), (10, 1278052), (20, 639026), (40, 319513), (41, 311720), (82, 155860), (164, 77930), (205, 62344), (328, 38965), (410, 31172), (820, 15586), (1640, 7793)]