20986252

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{431}}^1$

素因数の和:526

約数の個数: 48

約数和(自身を含む): 44126208

約数和(自身を除く): 23139956

約数列:

[1, 2, 4, 7, 14, 28, 37, 47, 74, 94, 148, 188, 259, 329, 431, 518, 658, 862, 1036, 1316, 1724, 1739, 3017, 3478, 6034, 6956, 12068, 12173, 15947, 20257, 24346, 31894, 40514, 48692, 63788, 81028, 111629, 141799, 223258, 283598, 446516, 567196, 749509, 1499018, 2998036, 5246563, 10493126, 20986252]

約数ペア:

[(1, 20986252), (2, 10493126), (4, 5246563), (7, 2998036), (14, 1499018), (28, 749509), (37, 567196), (47, 446516), (74, 283598), (94, 223258), (148, 141799), (188, 111629), (259, 81028), (329, 63788), (431, 48692), (518, 40514), (658, 31894), (862, 24346), (1036, 20257), (1316, 15947), (1724, 12173), (1739, 12068), (3017, 6956), (3478, 6034)]