81367405

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{3947}}^1$

素因数の和:4009

約数の個数: 32

約数和(自身を含む): 121282560

約数和(自身を除く): 39915155

約数列:

[1, 5, 7, 19, 31, 35, 95, 133, 155, 217, 589, 665, 1085, 2945, 3947, 4123, 19735, 20615, 27629, 74993, 122357, 138145, 374965, 524951, 611785, 856499, 2324783, 2624755, 4282495, 11623915, 16273481, 81367405]

約数ペア:

[(1, 81367405), (5, 16273481), (7, 11623915), (19, 4282495), (31, 2624755), (35, 2324783), (95, 856499), (133, 611785), (155, 524951), (217, 374965), (589, 138145), (665, 122357), (1085, 74993), (2945, 27629), (3947, 20615), (4123, 19735)]