19807905

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{647}}^1$

素因数の和:825

約数の個数: 32

約数和(自身を含む): 34401024

約数和(自身を除く): 14593119

約数列:

[1, 3, 5, 13, 15, 39, 65, 157, 195, 471, 647, 785, 1941, 2041, 2355, 3235, 6123, 8411, 9705, 10205, 25233, 30615, 42055, 101579, 126165, 304737, 507895, 1320527, 1523685, 3961581, 6602635, 19807905]

約数ペア:

[(1, 19807905), (3, 6602635), (5, 3961581), (13, 1523685), (15, 1320527), (39, 507895), (65, 304737), (157, 126165), (195, 101579), (471, 42055), (647, 30615), (785, 25233), (1941, 10205), (2041, 9705), (2355, 8411), (3235, 6123)]