820520

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{281}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 1878120

約数和(自身を除く): 1057600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 281, 292, 365, 562, 584, 730, 1124, 1405, 1460, 2248, 2810, 2920, 5620, 11240, 20513, 41026, 82052, 102565, 164104, 205130, 410260, 820520]

約数ペア:

[(1, 820520), (2, 410260), (4, 205130), (5, 164104), (8, 102565), (10, 82052), (20, 41026), (40, 20513), (73, 11240), (146, 5620), (281, 2920), (292, 2810), (365, 2248), (562, 1460), (584, 1405), (730, 1124)]