18620855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{173}}^1$

素因数の和:311

約数の個数: 32

約数和(自身を含む): 26058240

約数和(自身を除く): 7437385

約数列:

[1, 5, 11, 19, 55, 95, 103, 173, 209, 515, 865, 1045, 1133, 1903, 1957, 3287, 5665, 9515, 9785, 16435, 17819, 21527, 36157, 89095, 107635, 180785, 196009, 338561, 980045, 1692805, 3724171, 18620855]

約数ペア:

[(1, 18620855), (5, 3724171), (11, 1692805), (19, 980045), (55, 338561), (95, 196009), (103, 180785), (173, 107635), (209, 89095), (515, 36157), (865, 21527), (1045, 17819), (1133, 16435), (1903, 9785), (1957, 9515), (3287, 5665)]