21906995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{157}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 30032640

約数和(自身を除く): 8125645

約数列:

[1, 5, 11, 43, 55, 59, 157, 215, 295, 473, 649, 785, 1727, 2365, 2537, 3245, 6751, 8635, 9263, 12685, 27907, 33755, 46315, 74261, 101893, 139535, 371305, 398309, 509465, 1991545, 4381399, 21906995]

約数ペア:

[(1, 21906995), (5, 4381399), (11, 1991545), (43, 509465), (55, 398309), (59, 371305), (157, 139535), (215, 101893), (295, 74261), (473, 46315), (649, 33755), (785, 27907), (1727, 12685), (2365, 9263), (2537, 8635), (3245, 6751)]