21683080

素因数分解:

$2^3\times 5^1\times {\mathrm{547}}^1\times {\mathrm{991}}^1$

素因数の和:1549

約数の個数: 32

約数和(自身を含む): 48925440

約数和(自身を除く): 27242360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547, 991, 1094, 1982, 2188, 2735, 3964, 4376, 4955, 5470, 7928, 9910, 10940, 19820, 21880, 39640, 542077, 1084154, 2168308, 2710385, 4336616, 5420770, 10841540, 21683080]

約数ペア:

[(1, 21683080), (2, 10841540), (4, 5420770), (5, 4336616), (8, 2710385), (10, 2168308), (20, 1084154), (40, 542077), (547, 39640), (991, 21880), (1094, 19820), (1982, 10940), (2188, 9910), (2735, 7928), (3964, 5470), (4376, 4955)]