400787915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{1997}}^1$

素因数の和:2143

約数の個数: 32

約数和(自身を含む): 543775680

約数和(自身を除く): 142987765

約数列:

[1, 5, 11, 41, 55, 89, 205, 445, 451, 979, 1997, 2255, 3649, 4895, 9985, 18245, 21967, 40139, 81877, 109835, 177733, 200695, 409385, 888665, 900647, 1955063, 4503235, 7287053, 9775315, 36435265, 80157583, 400787915]

約数ペア:

[(1, 400787915), (5, 80157583), (11, 36435265), (41, 9775315), (55, 7287053), (89, 4503235), (205, 1955063), (445, 900647), (451, 888665), (979, 409385), (1997, 200695), (2255, 177733), (3649, 109835), (4895, 81877), (9985, 40139), (18245, 21967)]