21303975

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:86

約数の個数: 144

約数和(自身を含む): 48854016

約数和(自身を除く): 27550041

約数列:

[1, 3, 5, 7, 11, 15, 17, 21, 25, 31, 33, 35, 49, 51, 55, 75, 77, 85, 93, 105, 119, 147, 155, 165, 175, 187, 217, 231, 245, 255, 275, 341, 357, 385, 425, 465, 525, 527, 539, 561, 595, 651, 735, 775, 825, 833, 935, 1023, 1085, 1155, 1225, 1275, 1309, 1519, 1581, 1617, 1705, 1785, 1925, 2325, 2387, 2499, 2635, 2695, 2805, 2975, 3255, 3675, 3689, 3927, 4165, 4557, 4675, 5115, 5425, 5775, 5797, 6545, 7161, 7595, 7905, 8085, 8525, 8925, 9163, 11067, 11935, 12495, 13175, 13475, 14025, 16275, 16709, 17391, 18445, 19635, 20825, 22785, 25575, 25823, 27489, 28985, 32725, 35805, 37975, 39525, 40425, 40579, 45815, 50127, 55335, 59675, 62475, 77469, 83545, 86955, 92225, 98175, 113925, 121737, 129115, 137445, 144925, 179025, 202895, 229075, 250635, 276675, 284053, 387345, 417725, 434775, 608685, 645575, 687225, 852159, 1014475, 1253175, 1420265, 1936725, 3043425, 4260795, 7101325, 21303975]

約数ペア:

[(1, 21303975), (3, 7101325), (5, 4260795), (7, 3043425), (11, 1936725), (15, 1420265), (17, 1253175), (21, 1014475), (25, 852159), (31, 687225), (33, 645575), (35, 608685), (49, 434775), (51, 417725), (55, 387345), (75, 284053), (77, 276675), (85, 250635), (93, 229075), (105, 202895), (119, 179025), (147, 144925), (155, 137445), (165, 129115), (175, 121737), (187, 113925), (217, 98175), (231, 92225), (245, 86955), (255, 83545), (275, 77469), (341, 62475), (357, 59675), (385, 55335), (425, 50127), (465, 45815), (525, 40579), (527, 40425), (539, 39525), (561, 37975), (595, 35805), (651, 32725), (735, 28985), (775, 27489), (825, 25823), (833, 25575), (935, 22785), (1023, 20825), (1085, 19635), (1155, 18445), (1225, 17391), (1275, 16709), (1309, 16275), (1519, 14025), (1581, 13475), (1617, 13175), (1705, 12495), (1785, 11935), (1925, 11067), (2325, 9163), (2387, 8925), (2499, 8525), (2635, 8085), (2695, 7905), (2805, 7595), (2975, 7161), (3255, 6545), (3675, 5797), (3689, 5775), (3927, 5425), (4165, 5115), (4557, 4675)]