90139990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{20627}}^1$

素因数の和:20676

約数の個数: 32

約数和(自身を含む): 178225920

約数和(自身を除く): 88085930

約数列:

[1, 2, 5, 10, 19, 23, 38, 46, 95, 115, 190, 230, 437, 874, 2185, 4370, 20627, 41254, 103135, 206270, 391913, 474421, 783826, 948842, 1959565, 2372105, 3919130, 4744210, 9013999, 18027998, 45069995, 90139990]

約数ペア:

[(1, 90139990), (2, 45069995), (5, 18027998), (10, 9013999), (19, 4744210), (23, 3919130), (38, 2372105), (46, 1959565), (95, 948842), (115, 783826), (190, 474421), (230, 391913), (437, 206270), (874, 103135), (2185, 41254), (4370, 20627)]