28091900

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 64162560

約数和(自身を除く): 36070660

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 47, 50, 86, 94, 100, 139, 172, 188, 215, 235, 278, 430, 470, 556, 695, 860, 940, 1075, 1175, 1390, 2021, 2150, 2350, 2780, 3475, 4042, 4300, 4700, 5977, 6533, 6950, 8084, 10105, 11954, 13066, 13900, 20210, 23908, 26132, 29885, 32665, 40420, 50525, 59770, 65330, 101050, 119540, 130660, 149425, 163325, 202100, 280919, 298850, 326650, 561838, 597700, 653300, 1123676, 1404595, 2809190, 5618380, 7022975, 14045950, 28091900]

約数ペア:

[(1, 28091900), (2, 14045950), (4, 7022975), (5, 5618380), (10, 2809190), (20, 1404595), (25, 1123676), (43, 653300), (47, 597700), (50, 561838), (86, 326650), (94, 298850), (100, 280919), (139, 202100), (172, 163325), (188, 149425), (215, 130660), (235, 119540), (278, 101050), (430, 65330), (470, 59770), (556, 50525), (695, 40420), (860, 32665), (940, 29885), (1075, 26132), (1175, 23908), (1390, 20210), (2021, 13900), (2150, 13066), (2350, 11954), (2780, 10105), (3475, 8084), (4042, 6950), (4300, 6533), (4700, 5977)]