388492760

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{223}}^1\times {\mathrm{449}}^1$

素因数の和:780

約数の個数: 64

約数和(自身を含む): 889056000

約数和(自身を除く): 500563240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 194, 223, 388, 446, 449, 485, 776, 892, 898, 970, 1115, 1784, 1796, 1940, 2230, 2245, 3592, 3880, 4460, 4490, 8920, 8980, 17960, 21631, 43262, 43553, 86524, 87106, 100127, 108155, 173048, 174212, 200254, 216310, 217765, 348424, 400508, 432620, 435530, 500635, 801016, 865240, 871060, 1001270, 1742120, 2002540, 4005080, 9712319, 19424638, 38849276, 48561595, 77698552, 97123190, 194246380, 388492760]

約数ペア:

[(1, 388492760), (2, 194246380), (4, 97123190), (5, 77698552), (8, 48561595), (10, 38849276), (20, 19424638), (40, 9712319), (97, 4005080), (194, 2002540), (223, 1742120), (388, 1001270), (446, 871060), (449, 865240), (485, 801016), (776, 500635), (892, 435530), (898, 432620), (970, 400508), (1115, 348424), (1784, 217765), (1796, 216310), (1940, 200254), (2230, 174212), (2245, 173048), (3592, 108155), (3880, 100127), (4460, 87106), (4490, 86524), (8920, 43553), (8980, 43262), (17960, 21631)]