21965805

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1117}}^1$

素因数の和:1170

約数の個数: 48

約数和(自身を含む): 41857920

約数和(自身を除く): 19892115

約数列:

[1, 3, 5, 9, 15, 19, 23, 45, 57, 69, 95, 115, 171, 207, 285, 345, 437, 855, 1035, 1117, 1311, 2185, 3351, 3933, 5585, 6555, 10053, 16755, 19665, 21223, 25691, 50265, 63669, 77073, 106115, 128455, 191007, 231219, 318345, 385365, 488129, 955035, 1156095, 1464387, 2440645, 4393161, 7321935, 21965805]

約数ペア:

[(1, 21965805), (3, 7321935), (5, 4393161), (9, 2440645), (15, 1464387), (19, 1156095), (23, 955035), (45, 488129), (57, 385365), (69, 318345), (95, 231219), (115, 191007), (171, 128455), (207, 106115), (285, 77073), (345, 63669), (437, 50265), (855, 25691), (1035, 21223), (1117, 19665), (1311, 16755), (2185, 10053), (3351, 6555), (3933, 5585)]