20889855

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:165

約数の個数: 96

約数和(自身を含む): 45287424

約数和(自身を除く): 24397569

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 47, 51, 63, 83, 85, 105, 119, 141, 153, 235, 249, 255, 315, 329, 357, 415, 423, 581, 595, 705, 747, 765, 799, 987, 1071, 1245, 1411, 1645, 1743, 1785, 2115, 2397, 2905, 2961, 3735, 3901, 3995, 4233, 4935, 5229, 5355, 5593, 7055, 7191, 8715, 9877, 11703, 11985, 12699, 14805, 16779, 19505, 21165, 26145, 27307, 27965, 29631, 35109, 35955, 49385, 50337, 58515, 63495, 66317, 81921, 83895, 88893, 136535, 148155, 175545, 198951, 245763, 251685, 331585, 409605, 444465, 464219, 596853, 994755, 1228815, 1392657, 2321095, 2984265, 4177971, 6963285, 20889855]

約数ペア:

[(1, 20889855), (3, 6963285), (5, 4177971), (7, 2984265), (9, 2321095), (15, 1392657), (17, 1228815), (21, 994755), (35, 596853), (45, 464219), (47, 444465), (51, 409605), (63, 331585), (83, 251685), (85, 245763), (105, 198951), (119, 175545), (141, 148155), (153, 136535), (235, 88893), (249, 83895), (255, 81921), (315, 66317), (329, 63495), (357, 58515), (415, 50337), (423, 49385), (581, 35955), (595, 35109), (705, 29631), (747, 27965), (765, 27307), (799, 26145), (987, 21165), (1071, 19505), (1245, 16779), (1411, 14805), (1645, 12699), (1743, 11985), (1785, 11703), (2115, 9877), (2397, 8715), (2905, 7191), (2961, 7055), (3735, 5593), (3901, 5355), (3995, 5229), (4233, 4935)]