20547440

素因数分解:

$2^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{2543}}^1$

素因数の和:2657

約数の個数: 40

約数和(自身を含む): 48264768

約数和(自身を除く): 27717328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 101, 202, 404, 505, 808, 1010, 1616, 2020, 2543, 4040, 5086, 8080, 10172, 12715, 20344, 25430, 40688, 50860, 101720, 203440, 256843, 513686, 1027372, 1284215, 2054744, 2568430, 4109488, 5136860, 10273720, 20547440]

約数ペア:

[(1, 20547440), (2, 10273720), (4, 5136860), (5, 4109488), (8, 2568430), (10, 2054744), (16, 1284215), (20, 1027372), (40, 513686), (80, 256843), (101, 203440), (202, 101720), (404, 50860), (505, 40688), (808, 25430), (1010, 20344), (1616, 12715), (2020, 10172), (2543, 8080), (4040, 5086)]