28117760

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1997}}^1$

素因数の和:2029

約数の個数: 72

約数和(自身を含む): 73510416

約数和(自身を除く): 45392656

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 640, 704, 880, 1280, 1408, 1760, 1997, 2816, 3520, 3994, 7040, 7988, 9985, 14080, 15976, 19970, 21967, 31952, 39940, 43934, 63904, 79880, 87868, 109835, 127808, 159760, 175736, 219670, 255616, 319520, 351472, 439340, 511232, 639040, 702944, 878680, 1278080, 1405888, 1757360, 2556160, 2811776, 3514720, 5623552, 7029440, 14058880, 28117760]

約数ペア:

[(1, 28117760), (2, 14058880), (4, 7029440), (5, 5623552), (8, 3514720), (10, 2811776), (11, 2556160), (16, 1757360), (20, 1405888), (22, 1278080), (32, 878680), (40, 702944), (44, 639040), (55, 511232), (64, 439340), (80, 351472), (88, 319520), (110, 255616), (128, 219670), (160, 175736), (176, 159760), (220, 127808), (256, 109835), (320, 87868), (352, 79880), (440, 63904), (640, 43934), (704, 39940), (880, 31952), (1280, 21967), (1408, 19970), (1760, 15976), (1997, 14080), (2816, 9985), (3520, 7988), (3994, 7040)]