20543985

素因数分解:

$3^2\times 5^1\times 7^3\times {\mathrm{11}}^3$

素因数の和:65

約数の個数: 96

約数和(自身を含む): 45676800

約数和(自身を除く): 25132815

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 45, 49, 55, 63, 77, 99, 105, 121, 147, 165, 231, 245, 315, 343, 363, 385, 441, 495, 539, 605, 693, 735, 847, 1029, 1089, 1155, 1331, 1617, 1715, 1815, 2205, 2541, 2695, 3087, 3465, 3773, 3993, 4235, 4851, 5145, 5445, 5929, 6655, 7623, 8085, 9317, 11319, 11979, 12705, 15435, 17787, 18865, 19965, 24255, 27951, 29645, 33957, 38115, 41503, 46585, 53361, 56595, 59895, 65219, 83853, 88935, 124509, 139755, 169785, 195657, 207515, 266805, 326095, 373527, 419265, 456533, 586971, 622545, 978285, 1369599, 1867635, 2282665, 2934855, 4108797, 6847995, 20543985]

約数ペア:

[(1, 20543985), (3, 6847995), (5, 4108797), (7, 2934855), (9, 2282665), (11, 1867635), (15, 1369599), (21, 978285), (33, 622545), (35, 586971), (45, 456533), (49, 419265), (55, 373527), (63, 326095), (77, 266805), (99, 207515), (105, 195657), (121, 169785), (147, 139755), (165, 124509), (231, 88935), (245, 83853), (315, 65219), (343, 59895), (363, 56595), (385, 53361), (441, 46585), (495, 41503), (539, 38115), (605, 33957), (693, 29645), (735, 27951), (847, 24255), (1029, 19965), (1089, 18865), (1155, 17787), (1331, 15435), (1617, 12705), (1715, 11979), (1815, 11319), (2205, 9317), (2541, 8085), (2695, 7623), (3087, 6655), (3465, 5929), (3773, 5445), (3993, 5145), (4235, 4851)]