21659715

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1$

素因数の和:102

約数の個数: 144

約数和(自身を含む): 51217920

約数和(自身を除く): 29558205

約数列:

[1, 3, 5, 7, 9, 11, 15, 19, 21, 33, 35, 45, 47, 49, 55, 57, 63, 77, 95, 99, 105, 133, 141, 147, 165, 171, 209, 231, 235, 245, 285, 315, 329, 385, 399, 423, 441, 495, 517, 539, 627, 665, 693, 705, 735, 855, 893, 931, 987, 1045, 1155, 1197, 1463, 1551, 1617, 1645, 1881, 1995, 2115, 2205, 2303, 2585, 2679, 2695, 2793, 2961, 3135, 3465, 3619, 4389, 4465, 4653, 4655, 4851, 4935, 5985, 6251, 6909, 7315, 7755, 8037, 8085, 8379, 9405, 9823, 10241, 10857, 11515, 13167, 13395, 13965, 14805, 18095, 18753, 20727, 21945, 23265, 24255, 25333, 29469, 30723, 31255, 32571, 34545, 40185, 41895, 43757, 49115, 51205, 54285, 56259, 65835, 68761, 75999, 88407, 92169, 93765, 103635, 126665, 131271, 147345, 153615, 162855, 206283, 218785, 227997, 281295, 343805, 379995, 393813, 442035, 460845, 481327, 618849, 656355, 1031415, 1139985, 1443981, 1969065, 2406635, 3094245, 4331943, 7219905, 21659715]

約数ペア:

[(1, 21659715), (3, 7219905), (5, 4331943), (7, 3094245), (9, 2406635), (11, 1969065), (15, 1443981), (19, 1139985), (21, 1031415), (33, 656355), (35, 618849), (45, 481327), (47, 460845), (49, 442035), (55, 393813), (57, 379995), (63, 343805), (77, 281295), (95, 227997), (99, 218785), (105, 206283), (133, 162855), (141, 153615), (147, 147345), (165, 131271), (171, 126665), (209, 103635), (231, 93765), (235, 92169), (245, 88407), (285, 75999), (315, 68761), (329, 65835), (385, 56259), (399, 54285), (423, 51205), (441, 49115), (495, 43757), (517, 41895), (539, 40185), (627, 34545), (665, 32571), (693, 31255), (705, 30723), (735, 29469), (855, 25333), (893, 24255), (931, 23265), (987, 21945), (1045, 20727), (1155, 18753), (1197, 18095), (1463, 14805), (1551, 13965), (1617, 13395), (1645, 13167), (1881, 11515), (1995, 10857), (2115, 10241), (2205, 9823), (2303, 9405), (2585, 8379), (2679, 8085), (2695, 8037), (2793, 7755), (2961, 7315), (3135, 6909), (3465, 6251), (3619, 5985), (4389, 4935), (4465, 4851), (4653, 4655)]