20204080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19427}}^1$

素因数の和:19453

約数の個数: 40

約数和(自身を含む): 50590512

約数和(自身を除く): 30386432

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19427, 38854, 77708, 97135, 155416, 194270, 252551, 310832, 388540, 505102, 777080, 1010204, 1262755, 1554160, 2020408, 2525510, 4040816, 5051020, 10102040, 20204080]

約数ペア:

[(1, 20204080), (2, 10102040), (4, 5051020), (5, 4040816), (8, 2525510), (10, 2020408), (13, 1554160), (16, 1262755), (20, 1010204), (26, 777080), (40, 505102), (52, 388540), (65, 310832), (80, 252551), (104, 194270), (130, 155416), (208, 97135), (260, 77708), (520, 38854), (1040, 19427)]