639364

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{1321}}^1$

素因数の和:1347

約数の個数: 18

約数和(自身を含む): 1230782

約数和(自身を除く): 591418

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 1321, 2642, 5284, 14531, 29062, 58124, 159841, 319682, 639364]

約数ペア:

[(1, 639364), (2, 319682), (4, 159841), (11, 58124), (22, 29062), (44, 14531), (121, 5284), (242, 2642), (484, 1321)]