20989404

素因数分解:

$2^2\times 3^2\times {\mathrm{89}}^1\times {\mathrm{6551}}^1$

素因数の和:6650

約数の個数: 36

約数和(自身を含む): 53660880

約数和(自身を除く): 32671476

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 89, 178, 267, 356, 534, 801, 1068, 1602, 3204, 6551, 13102, 19653, 26204, 39306, 58959, 78612, 117918, 235836, 583039, 1166078, 1749117, 2332156, 3498234, 5247351, 6996468, 10494702, 20989404]

約数ペア:

[(1, 20989404), (2, 10494702), (3, 6996468), (4, 5247351), (6, 3498234), (9, 2332156), (12, 1749117), (18, 1166078), (36, 583039), (89, 235836), (178, 117918), (267, 78612), (356, 58959), (534, 39306), (801, 26204), (1068, 19653), (1602, 13102), (3204, 6551)]