18991580

素因数分解:

$2^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{7477}}^1$

素因数の和:7613

約数の個数: 24

約数和(自身を含む): 40201728

約数和(自身を除く): 21210148

約数列:

[1, 2, 4, 5, 10, 20, 127, 254, 508, 635, 1270, 2540, 7477, 14954, 29908, 37385, 74770, 149540, 949579, 1899158, 3798316, 4747895, 9495790, 18991580]

約数ペア:

[(1, 18991580), (2, 9495790), (4, 4747895), (5, 3798316), (10, 1899158), (20, 949579), (127, 149540), (254, 74770), (508, 37385), (635, 29908), (1270, 14954), (2540, 7477)]