989720

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:347

約数の個数: 32

約数和(自身を含む): 2257200

約数和(自身を除く): 1267480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 227, 436, 454, 545, 872, 908, 1090, 1135, 1816, 2180, 2270, 4360, 4540, 9080, 24743, 49486, 98972, 123715, 197944, 247430, 494860, 989720]

約数ペア:

[(1, 989720), (2, 494860), (4, 247430), (5, 197944), (8, 123715), (10, 98972), (20, 49486), (40, 24743), (109, 9080), (218, 4540), (227, 4360), (436, 2270), (454, 2180), (545, 1816), (872, 1135), (908, 1090)]