18720776

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:222

約数の個数: 64

約数和(自身を含む): 39744000

約数和(自身を除く): 21023224

約数列:

[1, 2, 4, 8, 19, 29, 31, 38, 58, 62, 76, 116, 124, 137, 152, 232, 248, 274, 548, 551, 589, 899, 1096, 1102, 1178, 1798, 2204, 2356, 2603, 3596, 3973, 4247, 4408, 4712, 5206, 7192, 7946, 8494, 10412, 15892, 16988, 17081, 20824, 31784, 33976, 34162, 68324, 75487, 80693, 123163, 136648, 150974, 161386, 246326, 301948, 322772, 492652, 603896, 645544, 985304, 2340097, 4680194, 9360388, 18720776]

約数ペア:

[(1, 18720776), (2, 9360388), (4, 4680194), (8, 2340097), (19, 985304), (29, 645544), (31, 603896), (38, 492652), (58, 322772), (62, 301948), (76, 246326), (116, 161386), (124, 150974), (137, 136648), (152, 123163), (232, 80693), (248, 75487), (274, 68324), (548, 34162), (551, 33976), (589, 31784), (899, 20824), (1096, 17081), (1102, 16988), (1178, 15892), (1798, 10412), (2204, 8494), (2356, 7946), (2603, 7192), (3596, 5206), (3973, 4712), (4247, 4408)]