81977995

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{2039}}^1$

素因数の和:2115

約数の個数: 32

約数和(自身を含む): 116328960

約数和(自身を除く): 34350965

約数列:

[1, 5, 11, 17, 43, 55, 85, 187, 215, 473, 731, 935, 2039, 2365, 3655, 8041, 10195, 22429, 34663, 40205, 87677, 112145, 173315, 381293, 438385, 964447, 1490509, 1906465, 4822235, 7452545, 16395599, 81977995]

約数ペア:

[(1, 81977995), (5, 16395599), (11, 7452545), (17, 4822235), (43, 1906465), (55, 1490509), (85, 964447), (187, 438385), (215, 381293), (473, 173315), (731, 112145), (935, 87677), (2039, 40205), (2365, 34663), (3655, 22429), (8041, 10195)]