21070791

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{607}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 37939200

約数和(自身を除く): 16868409

約数列:

[1, 3, 7, 9, 19, 21, 29, 57, 63, 87, 133, 171, 203, 261, 399, 551, 607, 609, 1197, 1653, 1821, 1827, 3857, 4249, 4959, 5463, 11533, 11571, 12747, 17603, 34599, 34713, 38241, 52809, 80731, 103797, 123221, 158427, 242193, 334457, 369663, 726579, 1003371, 1108989, 2341199, 3010113, 7023597, 21070791]

約数ペア:

[(1, 21070791), (3, 7023597), (7, 3010113), (9, 2341199), (19, 1108989), (21, 1003371), (29, 726579), (57, 369663), (63, 334457), (87, 242193), (133, 158427), (171, 123221), (203, 103797), (261, 80731), (399, 52809), (551, 38241), (607, 34713), (609, 34599), (1197, 17603), (1653, 12747), (1821, 11571), (1827, 11533), (3857, 5463), (4249, 4959)]