21878626

素因数分解:

$2^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:235

約数の個数: 64

約数和(自身を含む): 44354304

約数和(自身を除く): 22475678

約数列:

[1, 2, 7, 11, 14, 17, 22, 34, 61, 77, 119, 122, 137, 154, 187, 238, 274, 374, 427, 671, 854, 959, 1037, 1309, 1342, 1507, 1918, 2074, 2329, 2618, 3014, 4658, 4697, 7259, 8357, 9394, 10549, 11407, 14518, 16303, 16714, 21098, 22814, 25619, 32606, 51238, 58499, 79849, 91927, 116998, 142069, 159698, 179333, 183854, 284138, 358666, 643489, 994483, 1286978, 1562759, 1988966, 3125518, 10939313, 21878626]

約数ペア:

[(1, 21878626), (2, 10939313), (7, 3125518), (11, 1988966), (14, 1562759), (17, 1286978), (22, 994483), (34, 643489), (61, 358666), (77, 284138), (119, 183854), (122, 179333), (137, 159698), (154, 142069), (187, 116998), (238, 91927), (274, 79849), (374, 58499), (427, 51238), (671, 32606), (854, 25619), (959, 22814), (1037, 21098), (1309, 16714), (1342, 16303), (1507, 14518), (1918, 11407), (2074, 10549), (2329, 9394), (2618, 8357), (3014, 7259), (4658, 4697)]