845440

素因数分解:

$2^7\times 5^1\times {\mathrm{1321}}^1$

素因数の和:1340

約数の個数: 32

約数和(自身を含む): 2022660

約数和(自身を除く): 1177220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 1321, 2642, 5284, 6605, 10568, 13210, 21136, 26420, 42272, 52840, 84544, 105680, 169088, 211360, 422720, 845440]

約数ペア:

[(1, 845440), (2, 422720), (4, 211360), (5, 169088), (8, 105680), (10, 84544), (16, 52840), (20, 42272), (32, 26420), (40, 21136), (64, 13210), (80, 10568), (128, 6605), (160, 5284), (320, 2642), (640, 1321)]