21617768

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{199}}^1\times {\mathrm{367}}^1$

素因数の和:609

約数の個数: 32

約数和(自身を含む): 41952000

約数和(自身を除く): 20334232

約数列:

[1, 2, 4, 8, 37, 74, 148, 199, 296, 367, 398, 734, 796, 1468, 1592, 2936, 7363, 13579, 14726, 27158, 29452, 54316, 58904, 73033, 108632, 146066, 292132, 584264, 2702221, 5404442, 10808884, 21617768]

約数ペア:

[(1, 21617768), (2, 10808884), (4, 5404442), (8, 2702221), (37, 584264), (74, 292132), (148, 146066), (199, 108632), (296, 73033), (367, 58904), (398, 54316), (734, 29452), (796, 27158), (1468, 14726), (1592, 13579), (2936, 7363)]