21971444

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{257}}^1$

素因数の和:368

約数の個数: 48

約数和(自身を含む): 44210880

約数和(自身を除く): 22239436

約数列:

[1, 2, 4, 11, 22, 29, 44, 58, 67, 116, 134, 257, 268, 319, 514, 638, 737, 1028, 1276, 1474, 1943, 2827, 2948, 3886, 5654, 7453, 7772, 11308, 14906, 17219, 21373, 29812, 34438, 42746, 68876, 81983, 85492, 163966, 189409, 327932, 378818, 499351, 757636, 998702, 1997404, 5492861, 10985722, 21971444]

約数ペア:

[(1, 21971444), (2, 10985722), (4, 5492861), (11, 1997404), (22, 998702), (29, 757636), (44, 499351), (58, 378818), (67, 327932), (116, 189409), (134, 163966), (257, 85492), (268, 81983), (319, 68876), (514, 42746), (638, 34438), (737, 29812), (1028, 21373), (1276, 17219), (1474, 14906), (1943, 11308), (2827, 7772), (2948, 7453), (3886, 5654)]