81123405

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{28921}}^1$

素因数の和:28957

約数の個数: 32

約数和(自身を含む): 149931648

約数和(自身を除く): 68808243

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805, 28921, 86763, 144605, 318131, 433815, 491657, 954393, 1474971, 1590655, 2458285, 4771965, 5408227, 7374855, 16224681, 27041135, 81123405]

約数ペア:

[(1, 81123405), (3, 27041135), (5, 16224681), (11, 7374855), (15, 5408227), (17, 4771965), (33, 2458285), (51, 1590655), (55, 1474971), (85, 954393), (165, 491657), (187, 433815), (255, 318131), (561, 144605), (935, 86763), (2805, 28921)]