20685760

素因数分解:

$2^6\times 5^1\times {\mathrm{127}}^1\times {\mathrm{509}}^1$

素因数の和:653

約数の個数: 56

約数和(自身を含む): 49743360

約数和(自身を除く): 29057600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 160, 254, 320, 508, 509, 635, 1016, 1018, 1270, 2032, 2036, 2540, 2545, 4064, 4072, 5080, 5090, 8128, 8144, 10160, 10180, 16288, 20320, 20360, 32576, 40640, 40720, 64643, 81440, 129286, 162880, 258572, 323215, 517144, 646430, 1034288, 1292860, 2068576, 2585720, 4137152, 5171440, 10342880, 20685760]

約数ペア:

[(1, 20685760), (2, 10342880), (4, 5171440), (5, 4137152), (8, 2585720), (10, 2068576), (16, 1292860), (20, 1034288), (32, 646430), (40, 517144), (64, 323215), (80, 258572), (127, 162880), (160, 129286), (254, 81440), (320, 64643), (508, 40720), (509, 40640), (635, 32576), (1016, 20360), (1018, 20320), (1270, 16288), (2032, 10180), (2036, 10160), (2540, 8144), (2545, 8128), (4064, 5090), (4072, 5080)]