19953760

素因数分解:

$2^5\times 5^1\times {\mathrm{311}}^1\times {\mathrm{401}}^1$

素因数の和:727

約数の個数: 48

約数和(自身を含む): 47410272

約数和(自身を除く): 27456512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 311, 401, 622, 802, 1244, 1555, 1604, 2005, 2488, 3110, 3208, 4010, 4976, 6220, 6416, 8020, 9952, 12440, 12832, 16040, 24880, 32080, 49760, 64160, 124711, 249422, 498844, 623555, 997688, 1247110, 1995376, 2494220, 3990752, 4988440, 9976880, 19953760]

約数ペア:

[(1, 19953760), (2, 9976880), (4, 4988440), (5, 3990752), (8, 2494220), (10, 1995376), (16, 1247110), (20, 997688), (32, 623555), (40, 498844), (80, 249422), (160, 124711), (311, 64160), (401, 49760), (622, 32080), (802, 24880), (1244, 16040), (1555, 12832), (1604, 12440), (2005, 9952), (2488, 8020), (3110, 6416), (3208, 6220), (4010, 4976)]