20721080

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{17863}}^1$

素因数の和:17903

約数の個数: 32

約数和(自身を含む): 48232800

約数和(自身を除く): 27511720

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 17863, 35726, 71452, 89315, 142904, 178630, 357260, 518027, 714520, 1036054, 2072108, 2590135, 4144216, 5180270, 10360540, 20721080]

約数ペア:

[(1, 20721080), (2, 10360540), (4, 5180270), (5, 4144216), (8, 2590135), (10, 2072108), (20, 1036054), (29, 714520), (40, 518027), (58, 357260), (116, 178630), (145, 142904), (232, 89315), (290, 71452), (580, 35726), (1160, 17863)]