21264705

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^2$

素因数の和:84

約数の個数: 144

約数和(自身を含む): 51352704

約数和(自身を除く): 30087999

約数列:

[1, 3, 5, 7, 9, 11, 15, 17, 19, 21, 33, 35, 45, 51, 55, 57, 63, 77, 85, 95, 99, 105, 119, 133, 153, 165, 171, 187, 209, 231, 255, 285, 315, 323, 357, 361, 385, 399, 495, 561, 595, 627, 665, 693, 765, 855, 935, 969, 1045, 1071, 1083, 1155, 1197, 1309, 1463, 1615, 1683, 1785, 1805, 1881, 1995, 2261, 2527, 2805, 2907, 3135, 3249, 3465, 3553, 3927, 3971, 4389, 4845, 5355, 5415, 5985, 6137, 6545, 6783, 7315, 7581, 8415, 9405, 10659, 11305, 11781, 11913, 12635, 13167, 14535, 16245, 17765, 18411, 19635, 19855, 20349, 21945, 22743, 24871, 27797, 30685, 31977, 33915, 35739, 37905, 42959, 53295, 55233, 58905, 59565, 65835, 67507, 74613, 83391, 92055, 101745, 113715, 124355, 128877, 138985, 159885, 178695, 202521, 214795, 223839, 250173, 276165, 337535, 373065, 386631, 416955, 472549, 607563, 644385, 1012605, 1119195, 1250865, 1417647, 1933155, 2362745, 3037815, 4252941, 7088235, 21264705]

約数ペア:

[(1, 21264705), (3, 7088235), (5, 4252941), (7, 3037815), (9, 2362745), (11, 1933155), (15, 1417647), (17, 1250865), (19, 1119195), (21, 1012605), (33, 644385), (35, 607563), (45, 472549), (51, 416955), (55, 386631), (57, 373065), (63, 337535), (77, 276165), (85, 250173), (95, 223839), (99, 214795), (105, 202521), (119, 178695), (133, 159885), (153, 138985), (165, 128877), (171, 124355), (187, 113715), (209, 101745), (231, 92055), (255, 83391), (285, 74613), (315, 67507), (323, 65835), (357, 59565), (361, 58905), (385, 55233), (399, 53295), (495, 42959), (561, 37905), (595, 35739), (627, 33915), (665, 31977), (693, 30685), (765, 27797), (855, 24871), (935, 22743), (969, 21945), (1045, 20349), (1071, 19855), (1083, 19635), (1155, 18411), (1197, 17765), (1309, 16245), (1463, 14535), (1615, 13167), (1683, 12635), (1785, 11913), (1805, 11781), (1881, 11305), (1995, 10659), (2261, 9405), (2527, 8415), (2805, 7581), (2907, 7315), (3135, 6783), (3249, 6545), (3465, 6137), (3553, 5985), (3927, 5415), (3971, 5355), (4389, 4845)]