40720520

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2617}}^1$

素因数の和:3017

約数の個数: 32

約数和(自身を含む): 91891800

約数和(自身を除く): 51171280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 2617, 3112, 3890, 5234, 7780, 10468, 13085, 15560, 20936, 26170, 52340, 104680, 1018013, 2036026, 4072052, 5090065, 8144104, 10180130, 20360260, 40720520]

約数ペア:

[(1, 40720520), (2, 20360260), (4, 10180130), (5, 8144104), (8, 5090065), (10, 4072052), (20, 2036026), (40, 1018013), (389, 104680), (778, 52340), (1556, 26170), (1945, 20936), (2617, 15560), (3112, 13085), (3890, 10468), (5234, 7780)]