155398840

素因数分解:

$2^3\times 5^1\times {\mathrm{971}}^1\times {\mathrm{4001}}^1$

素因数の和:4983

約数の個数: 32

約数和(自身を含む): 350094960

約数和(自身を除く): 194696120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 971, 1942, 3884, 4001, 4855, 7768, 8002, 9710, 16004, 19420, 20005, 32008, 38840, 40010, 80020, 160040, 3884971, 7769942, 15539884, 19424855, 31079768, 38849710, 77699420, 155398840]

約数ペア:

[(1, 155398840), (2, 77699420), (4, 38849710), (5, 31079768), (8, 19424855), (10, 15539884), (20, 7769942), (40, 3884971), (971, 160040), (1942, 80020), (3884, 40010), (4001, 38840), (4855, 32008), (7768, 20005), (8002, 19420), (9710, 16004)]