20879612

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{67}}^1\times {\mathrm{461}}^1$

素因数の和:558

約数の個数: 36

約数和(自身を含む): 40243896

約数和(自身を除く): 19364284

約数列:

[1, 2, 4, 13, 26, 52, 67, 134, 169, 268, 338, 461, 676, 871, 922, 1742, 1844, 3484, 5993, 11323, 11986, 22646, 23972, 30887, 45292, 61774, 77909, 123548, 155818, 311636, 401531, 803062, 1606124, 5219903, 10439806, 20879612]

約数ペア:

[(1, 20879612), (2, 10439806), (4, 5219903), (13, 1606124), (26, 803062), (52, 401531), (67, 311636), (134, 155818), (169, 123548), (268, 77909), (338, 61774), (461, 45292), (676, 30887), (871, 23972), (922, 22646), (1742, 11986), (1844, 11323), (3484, 5993)]