285440

素因数分解:

$2^8\times 5^1\times {\mathrm{223}}^1$

素因数の和:244

約数の個数: 36

約数和(自身を含む): 686784

約数和(自身を除く): 401344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 223, 256, 320, 446, 640, 892, 1115, 1280, 1784, 2230, 3568, 4460, 7136, 8920, 14272, 17840, 28544, 35680, 57088, 71360, 142720, 285440]

約数ペア:

[(1, 285440), (2, 142720), (4, 71360), (5, 57088), (8, 35680), (10, 28544), (16, 17840), (20, 14272), (32, 8920), (40, 7136), (64, 4460), (80, 3568), (128, 2230), (160, 1784), (223, 1280), (256, 1115), (320, 892), (446, 640)]