20690289

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1$

素因数の和:334

約数の個数: 32

約数和(自身を含む): 31920000

約数和(自身を除く): 11229711

約数列:

[1, 3, 9, 27, 37, 111, 139, 149, 333, 417, 447, 999, 1251, 1341, 3753, 4023, 5143, 5513, 15429, 16539, 20711, 46287, 49617, 62133, 138861, 148851, 186399, 559197, 766307, 2298921, 6896763, 20690289]

約数ペア:

[(1, 20690289), (3, 6896763), (9, 2298921), (27, 766307), (37, 559197), (111, 186399), (139, 148851), (149, 138861), (333, 62133), (417, 49617), (447, 46287), (999, 20711), (1251, 16539), (1341, 15429), (3753, 5513), (4023, 5143)]