21070728

素因数分解:

$2^3\times 3^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{431}}^1$

素因数の和:547

約数の個数: 96

約数和(自身を含む): 66044160

約数和(自身を除く): 44973432

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 56, 63, 72, 84, 97, 126, 168, 194, 252, 291, 388, 431, 504, 582, 679, 776, 862, 873, 1164, 1293, 1358, 1724, 1746, 2037, 2328, 2586, 2716, 3017, 3448, 3492, 3879, 4074, 5172, 5432, 6034, 6111, 6984, 7758, 8148, 9051, 10344, 12068, 12222, 15516, 16296, 18102, 24136, 24444, 27153, 31032, 36204, 41807, 48888, 54306, 72408, 83614, 108612, 125421, 167228, 217224, 250842, 292649, 334456, 376263, 501684, 585298, 752526, 877947, 1003368, 1170596, 1505052, 1755894, 2341192, 2633841, 3010104, 3511788, 5267682, 7023576, 10535364, 21070728]

約数ペア:

[(1, 21070728), (2, 10535364), (3, 7023576), (4, 5267682), (6, 3511788), (7, 3010104), (8, 2633841), (9, 2341192), (12, 1755894), (14, 1505052), (18, 1170596), (21, 1003368), (24, 877947), (28, 752526), (36, 585298), (42, 501684), (56, 376263), (63, 334456), (72, 292649), (84, 250842), (97, 217224), (126, 167228), (168, 125421), (194, 108612), (252, 83614), (291, 72408), (388, 54306), (431, 48888), (504, 41807), (582, 36204), (679, 31032), (776, 27153), (862, 24444), (873, 24136), (1164, 18102), (1293, 16296), (1358, 15516), (1724, 12222), (1746, 12068), (2037, 10344), (2328, 9051), (2586, 8148), (2716, 7758), (3017, 6984), (3448, 6111), (3492, 6034), (3879, 5432), (4074, 5172)]