21681828

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{887}}^1$

素因数の和:1001

約数の個数: 72

約数和(自身を含む): 63353472

約数和(自身を除く): 41671644

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 97, 126, 194, 252, 291, 388, 582, 679, 873, 887, 1164, 1358, 1746, 1774, 2037, 2661, 2716, 3492, 3548, 4074, 5322, 6111, 6209, 7983, 8148, 10644, 12222, 12418, 15966, 18627, 24444, 24836, 31932, 37254, 55881, 74508, 86039, 111762, 172078, 223524, 258117, 344156, 516234, 602273, 774351, 1032468, 1204546, 1548702, 1806819, 2409092, 3097404, 3613638, 5420457, 7227276, 10840914, 21681828]

約数ペア:

[(1, 21681828), (2, 10840914), (3, 7227276), (4, 5420457), (6, 3613638), (7, 3097404), (9, 2409092), (12, 1806819), (14, 1548702), (18, 1204546), (21, 1032468), (28, 774351), (36, 602273), (42, 516234), (63, 344156), (84, 258117), (97, 223524), (126, 172078), (194, 111762), (252, 86039), (291, 74508), (388, 55881), (582, 37254), (679, 31932), (873, 24836), (887, 24444), (1164, 18627), (1358, 15966), (1746, 12418), (1774, 12222), (2037, 10644), (2661, 8148), (2716, 7983), (3492, 6209), (3548, 6111), (4074, 5322)]