21123136

素因数分解:

$2^6\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{599}}^1$

素因数の和:659

約数の個数: 56

約数和(自身を含む): 45720000

約数和(自身を除く): 24596864

約数列:

[1, 2, 4, 8, 16, 19, 29, 32, 38, 58, 64, 76, 116, 152, 232, 304, 464, 551, 599, 608, 928, 1102, 1198, 1216, 1856, 2204, 2396, 4408, 4792, 8816, 9584, 11381, 17371, 17632, 19168, 22762, 34742, 35264, 38336, 45524, 69484, 91048, 138968, 182096, 277936, 330049, 364192, 555872, 660098, 728384, 1111744, 1320196, 2640392, 5280784, 10561568, 21123136]

約数ペア:

[(1, 21123136), (2, 10561568), (4, 5280784), (8, 2640392), (16, 1320196), (19, 1111744), (29, 728384), (32, 660098), (38, 555872), (58, 364192), (64, 330049), (76, 277936), (116, 182096), (152, 138968), (232, 91048), (304, 69484), (464, 45524), (551, 38336), (599, 35264), (608, 34742), (928, 22762), (1102, 19168), (1198, 17632), (1216, 17371), (1856, 11381), (2204, 9584), (2396, 8816), (4408, 4792)]