389969480

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{145511}}^1$

素因数の和:145589

約数の個数: 32

約数和(自身を含む): 890533440

約数和(自身を除く): 500563960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 145511, 291022, 582044, 727555, 1164088, 1455110, 2910220, 5820440, 9749237, 19498474, 38996948, 48746185, 77993896, 97492370, 194984740, 389969480]

約数ペア:

[(1, 389969480), (2, 194984740), (4, 97492370), (5, 77993896), (8, 48746185), (10, 38996948), (20, 19498474), (40, 9749237), (67, 5820440), (134, 2910220), (268, 1455110), (335, 1164088), (536, 727555), (670, 582044), (1340, 291022), (2680, 145511)]