127980520

素因数分解:

$2^3\times 5^1\times {\mathrm{1399}}^1\times {\mathrm{2287}}^1$

素因数の和:3697

約数の個数: 32

約数和(自身を含む): 288288000

約数和(自身を除く): 160307480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1399, 2287, 2798, 4574, 5596, 6995, 9148, 11192, 11435, 13990, 18296, 22870, 27980, 45740, 55960, 91480, 3199513, 6399026, 12798052, 15997565, 25596104, 31995130, 63990260, 127980520]

約数ペア:

[(1, 127980520), (2, 63990260), (4, 31995130), (5, 25596104), (8, 15997565), (10, 12798052), (20, 6399026), (40, 3199513), (1399, 91480), (2287, 55960), (2798, 45740), (4574, 27980), (5596, 22870), (6995, 18296), (9148, 13990), (11192, 11435)]