21978516

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{293}}^1$

素因数の和:373

約数の個数: 96

約数和(自身を含む): 63221760

約数和(自身を除く): 41243244

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 19, 21, 28, 38, 42, 47, 57, 76, 84, 94, 114, 133, 141, 188, 228, 266, 282, 293, 329, 399, 532, 564, 586, 658, 798, 879, 893, 987, 1172, 1316, 1596, 1758, 1786, 1974, 2051, 2679, 3516, 3572, 3948, 4102, 5358, 5567, 6153, 6251, 8204, 10716, 11134, 12306, 12502, 13771, 16701, 18753, 22268, 24612, 25004, 27542, 33402, 37506, 38969, 41313, 55084, 66804, 75012, 77938, 82626, 96397, 116907, 155876, 165252, 192794, 233814, 261649, 289191, 385588, 467628, 523298, 578382, 784947, 1046596, 1156764, 1569894, 1831543, 3139788, 3663086, 5494629, 7326172, 10989258, 21978516]

約数ペア:

[(1, 21978516), (2, 10989258), (3, 7326172), (4, 5494629), (6, 3663086), (7, 3139788), (12, 1831543), (14, 1569894), (19, 1156764), (21, 1046596), (28, 784947), (38, 578382), (42, 523298), (47, 467628), (57, 385588), (76, 289191), (84, 261649), (94, 233814), (114, 192794), (133, 165252), (141, 155876), (188, 116907), (228, 96397), (266, 82626), (282, 77938), (293, 75012), (329, 66804), (399, 55084), (532, 41313), (564, 38969), (586, 37506), (658, 33402), (798, 27542), (879, 25004), (893, 24612), (987, 22268), (1172, 18753), (1316, 16701), (1596, 13771), (1758, 12502), (1786, 12306), (1974, 11134), (2051, 10716), (2679, 8204), (3516, 6251), (3572, 6153), (3948, 5567), (4102, 5358)]