21080576

素因数分解:

$2^9\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1$

素因数の和:245

約数の個数: 80

約数和(自身を含む): 48612960

約数和(自身を除く): 27532384

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 32, 38, 44, 64, 76, 88, 128, 152, 176, 197, 209, 256, 304, 352, 394, 418, 512, 608, 704, 788, 836, 1216, 1408, 1576, 1672, 2167, 2432, 2816, 3152, 3344, 3743, 4334, 4864, 5632, 6304, 6688, 7486, 8668, 9728, 12608, 13376, 14972, 17336, 25216, 26752, 29944, 34672, 41173, 50432, 53504, 59888, 69344, 82346, 100864, 107008, 119776, 138688, 164692, 239552, 277376, 329384, 479104, 554752, 658768, 958208, 1109504, 1317536, 1916416, 2635072, 5270144, 10540288, 21080576]

約数ペア:

[(1, 21080576), (2, 10540288), (4, 5270144), (8, 2635072), (11, 1916416), (16, 1317536), (19, 1109504), (22, 958208), (32, 658768), (38, 554752), (44, 479104), (64, 329384), (76, 277376), (88, 239552), (128, 164692), (152, 138688), (176, 119776), (197, 107008), (209, 100864), (256, 82346), (304, 69344), (352, 59888), (394, 53504), (418, 50432), (512, 41173), (608, 34672), (704, 29944), (788, 26752), (836, 25216), (1216, 17336), (1408, 14972), (1576, 13376), (1672, 12608), (2167, 9728), (2432, 8668), (2816, 7486), (3152, 6688), (3344, 6304), (3743, 5632), (4334, 4864)]