28051480

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{347}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 66147840

約数和(自身を除く): 38096360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 47, 86, 94, 172, 188, 215, 235, 344, 347, 376, 430, 470, 694, 860, 940, 1388, 1720, 1735, 1880, 2021, 2776, 3470, 4042, 6940, 8084, 10105, 13880, 14921, 16168, 16309, 20210, 29842, 32618, 40420, 59684, 65236, 74605, 80840, 81545, 119368, 130472, 149210, 163090, 298420, 326180, 596840, 652360, 701287, 1402574, 2805148, 3506435, 5610296, 7012870, 14025740, 28051480]

約数ペア:

[(1, 28051480), (2, 14025740), (4, 7012870), (5, 5610296), (8, 3506435), (10, 2805148), (20, 1402574), (40, 701287), (43, 652360), (47, 596840), (86, 326180), (94, 298420), (172, 163090), (188, 149210), (215, 130472), (235, 119368), (344, 81545), (347, 80840), (376, 74605), (430, 65236), (470, 59684), (694, 40420), (860, 32618), (940, 29842), (1388, 20210), (1720, 16309), (1735, 16168), (1880, 14921), (2021, 13880), (2776, 10105), (3470, 8084), (4042, 6940)]