21651795

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1$

素因数の和:153

約数の個数: 96

約数和(自身を含む): 45287424

約数和(自身を除く): 23635629

約数列:

[1, 3, 5, 9, 11, 15, 17, 31, 33, 45, 51, 55, 83, 85, 93, 99, 153, 155, 165, 187, 249, 255, 279, 341, 415, 465, 495, 527, 561, 747, 765, 913, 935, 1023, 1245, 1395, 1411, 1581, 1683, 1705, 2573, 2635, 2739, 2805, 3069, 3735, 4233, 4565, 4743, 5115, 5797, 7055, 7719, 7905, 8217, 8415, 12699, 12865, 13695, 15345, 15521, 17391, 21165, 23157, 23715, 28303, 28985, 38595, 41085, 43741, 46563, 52173, 63495, 77605, 84909, 86955, 115785, 131223, 139689, 141515, 218705, 232815, 254727, 260865, 393669, 424545, 481151, 656115, 698445, 1273635, 1443453, 1968345, 2405755, 4330359, 7217265, 21651795]

約数ペア:

[(1, 21651795), (3, 7217265), (5, 4330359), (9, 2405755), (11, 1968345), (15, 1443453), (17, 1273635), (31, 698445), (33, 656115), (45, 481151), (51, 424545), (55, 393669), (83, 260865), (85, 254727), (93, 232815), (99, 218705), (153, 141515), (155, 139689), (165, 131223), (187, 115785), (249, 86955), (255, 84909), (279, 77605), (341, 63495), (415, 52173), (465, 46563), (495, 43741), (527, 41085), (561, 38595), (747, 28985), (765, 28303), (913, 23715), (935, 23157), (1023, 21165), (1245, 17391), (1395, 15521), (1411, 15345), (1581, 13695), (1683, 12865), (1705, 12699), (2573, 8415), (2635, 8217), (2739, 7905), (2805, 7719), (3069, 7055), (3735, 5797), (4233, 5115), (4565, 4743)]