20398616

素因数分解:

$2^3\times 7^1\times {\mathrm{563}}^1\times {\mathrm{647}}^1$

素因数の和:1223

約数の個数: 32

約数和(自身を含む): 43856640

約数和(自身を除く): 23458024

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 563, 647, 1126, 1294, 2252, 2588, 3941, 4504, 4529, 5176, 7882, 9058, 15764, 18116, 31528, 36232, 364261, 728522, 1457044, 2549827, 2914088, 5099654, 10199308, 20398616]

約数ペア:

[(1, 20398616), (2, 10199308), (4, 5099654), (7, 2914088), (8, 2549827), (14, 1457044), (28, 728522), (56, 364261), (563, 36232), (647, 31528), (1126, 18116), (1294, 15764), (2252, 9058), (2588, 7882), (3941, 5176), (4504, 4529)]