21616120

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2153}}^1$

素因数の和:2415

約数の個数: 32

約数和(自身を含む): 48852720

約数和(自身を除く): 27236600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2153, 2510, 4306, 5020, 8612, 10040, 10765, 17224, 21530, 43060, 86120, 540403, 1080806, 2161612, 2702015, 4323224, 5404030, 10808060, 21616120]

約数ペア:

[(1, 21616120), (2, 10808060), (4, 5404030), (5, 4323224), (8, 2702015), (10, 2161612), (20, 1080806), (40, 540403), (251, 86120), (502, 43060), (1004, 21530), (1255, 17224), (2008, 10765), (2153, 10040), (2510, 8612), (4306, 5020)]