21042728

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{19777}}^1$

素因数の和:19809

約数の個数: 32

約数和(自身を含む): 47467200

約数和(自身を除く): 26424472

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 152, 266, 532, 1064, 19777, 39554, 79108, 138439, 158216, 276878, 375763, 553756, 751526, 1107512, 1503052, 2630341, 3006104, 5260682, 10521364, 21042728]

約数ペア:

[(1, 21042728), (2, 10521364), (4, 5260682), (7, 3006104), (8, 2630341), (14, 1503052), (19, 1107512), (28, 751526), (38, 553756), (56, 375763), (76, 276878), (133, 158216), (152, 138439), (266, 79108), (532, 39554), (1064, 19777)]