19988724

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:205

約数の個数: 96

約数和(自身を含む): 55996416

約数和(自身を除く): 36007692

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 47, 61, 83, 84, 94, 122, 141, 166, 183, 188, 244, 249, 282, 329, 332, 366, 427, 498, 564, 581, 658, 732, 854, 987, 996, 1162, 1281, 1316, 1708, 1743, 1974, 2324, 2562, 2867, 3486, 3901, 3948, 5063, 5124, 5734, 6972, 7802, 8601, 10126, 11468, 11703, 15189, 15604, 17202, 20069, 20252, 23406, 27307, 30378, 34404, 35441, 40138, 46812, 54614, 60207, 60756, 70882, 80276, 81921, 106323, 109228, 120414, 141764, 163842, 212646, 237961, 240828, 327684, 425292, 475922, 713883, 951844, 1427766, 1665727, 2855532, 3331454, 4997181, 6662908, 9994362, 19988724]

約数ペア:

[(1, 19988724), (2, 9994362), (3, 6662908), (4, 4997181), (6, 3331454), (7, 2855532), (12, 1665727), (14, 1427766), (21, 951844), (28, 713883), (42, 475922), (47, 425292), (61, 327684), (83, 240828), (84, 237961), (94, 212646), (122, 163842), (141, 141764), (166, 120414), (183, 109228), (188, 106323), (244, 81921), (249, 80276), (282, 70882), (329, 60756), (332, 60207), (366, 54614), (427, 46812), (498, 40138), (564, 35441), (581, 34404), (658, 30378), (732, 27307), (854, 23406), (987, 20252), (996, 20069), (1162, 17202), (1281, 15604), (1316, 15189), (1708, 11703), (1743, 11468), (1974, 10126), (2324, 8601), (2562, 7802), (2867, 6972), (3486, 5734), (3901, 5124), (3948, 5063)]