20972152

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{193}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 42881760

約数和(自身を除く): 21909608

約数列:

[1, 2, 4, 8, 17, 34, 47, 68, 94, 136, 188, 193, 289, 376, 386, 578, 772, 799, 1156, 1544, 1598, 2312, 3196, 3281, 6392, 6562, 9071, 13124, 13583, 18142, 26248, 27166, 36284, 54332, 55777, 72568, 108664, 111554, 154207, 223108, 308414, 446216, 616828, 1233656, 2621519, 5243038, 10486076, 20972152]

約数ペア:

[(1, 20972152), (2, 10486076), (4, 5243038), (8, 2621519), (17, 1233656), (34, 616828), (47, 446216), (68, 308414), (94, 223108), (136, 154207), (188, 111554), (193, 108664), (289, 72568), (376, 55777), (386, 54332), (578, 36284), (772, 27166), (799, 26248), (1156, 18142), (1544, 13583), (1598, 13124), (2312, 9071), (3196, 6562), (3281, 6392)]