21657405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1103}}^1$

素因数の和:1146

約数の個数: 64

約数和(自身を含む): 45785088

約数和(自身を除く): 24127683

約数列:

[1, 3, 5, 7, 11, 15, 17, 21, 33, 35, 51, 55, 77, 85, 105, 119, 165, 187, 231, 255, 357, 385, 561, 595, 935, 1103, 1155, 1309, 1785, 2805, 3309, 3927, 5515, 6545, 7721, 12133, 16545, 18751, 19635, 23163, 36399, 38605, 56253, 60665, 84931, 93755, 115815, 131257, 181995, 206261, 254793, 281265, 393771, 424655, 618783, 656285, 1031305, 1273965, 1443827, 1968855, 3093915, 4331481, 7219135, 21657405]

約数ペア:

[(1, 21657405), (3, 7219135), (5, 4331481), (7, 3093915), (11, 1968855), (15, 1443827), (17, 1273965), (21, 1031305), (33, 656285), (35, 618783), (51, 424655), (55, 393771), (77, 281265), (85, 254793), (105, 206261), (119, 181995), (165, 131257), (187, 115815), (231, 93755), (255, 84931), (357, 60665), (385, 56253), (561, 38605), (595, 36399), (935, 23163), (1103, 19635), (1155, 18751), (1309, 16545), (1785, 12133), (2805, 7721), (3309, 6545), (3927, 5515)]