890243585

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{6781}}^1$

素因数の和:6846

約数の個数: 48

約数和(自身を含む): 1385481216

約数和(自身を除く): 495237631

約数列:

[1, 5, 7, 11, 31, 35, 55, 77, 121, 155, 217, 341, 385, 605, 847, 1085, 1705, 2387, 3751, 4235, 6781, 11935, 18755, 26257, 33905, 47467, 74591, 131285, 210211, 237335, 372955, 522137, 820501, 1051055, 1471477, 2312321, 2610685, 4102505, 5743507, 7357385, 11561605, 16186247, 25435531, 28717535, 80931235, 127177655, 178048717, 890243585]

約数ペア:

[(1, 890243585), (5, 178048717), (7, 127177655), (11, 80931235), (31, 28717535), (35, 25435531), (55, 16186247), (77, 11561605), (121, 7357385), (155, 5743507), (217, 4102505), (341, 2610685), (385, 2312321), (605, 1471477), (847, 1051055), (1085, 820501), (1705, 522137), (2387, 372955), (3751, 237335), (4235, 210211), (6781, 131285), (11935, 74591), (18755, 47467), (26257, 33905)]