19901840

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5077}}^1$

素因数の和:5104

約数の個数: 60

約数和(自身を含む): 53836956

約数和(自身を除く): 33935116

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5077, 10154, 20308, 25385, 35539, 40616, 50770, 71078, 81232, 101540, 142156, 177695, 203080, 248773, 284312, 355390, 406160, 497546, 568624, 710780, 995092, 1243865, 1421560, 1990184, 2487730, 2843120, 3980368, 4975460, 9950920, 19901840]

約数ペア:

[(1, 19901840), (2, 9950920), (4, 4975460), (5, 3980368), (7, 2843120), (8, 2487730), (10, 1990184), (14, 1421560), (16, 1243865), (20, 995092), (28, 710780), (35, 568624), (40, 497546), (49, 406160), (56, 355390), (70, 284312), (80, 248773), (98, 203080), (112, 177695), (140, 142156), (196, 101540), (245, 81232), (280, 71078), (392, 50770), (490, 40616), (560, 35539), (784, 25385), (980, 20308), (1960, 10154), (3920, 5077)]