9901220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{359}}^1$

素因数の和:572

約数の個数: 48

約数和(自身を含む): 23950080

約数和(自身を除く): 14048860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 359, 394, 718, 788, 985, 1379, 1436, 1795, 1970, 2513, 2758, 3590, 3940, 5026, 5516, 6895, 7180, 10052, 12565, 13790, 25130, 27580, 50260, 70723, 141446, 282892, 353615, 495061, 707230, 990122, 1414460, 1980244, 2475305, 4950610, 9901220]

約数ペア:

[(1, 9901220), (2, 4950610), (4, 2475305), (5, 1980244), (7, 1414460), (10, 990122), (14, 707230), (20, 495061), (28, 353615), (35, 282892), (70, 141446), (140, 70723), (197, 50260), (359, 27580), (394, 25130), (718, 13790), (788, 12565), (985, 10052), (1379, 7180), (1436, 6895), (1795, 5516), (1970, 5026), (2513, 3940), (2758, 3590)]