20987792

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:256

約数の個数: 80

約数和(自身を含む): 50211072

約数和(自身を除く): 29223280

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 73, 112, 119, 136, 146, 151, 238, 272, 292, 302, 476, 511, 584, 604, 952, 1022, 1057, 1168, 1208, 1241, 1904, 2044, 2114, 2416, 2482, 2567, 4088, 4228, 4964, 5134, 8176, 8456, 8687, 9928, 10268, 11023, 16912, 17374, 17969, 19856, 20536, 22046, 34748, 35938, 41072, 44092, 69496, 71876, 77161, 88184, 138992, 143752, 154322, 176368, 187391, 287504, 308644, 374782, 617288, 749564, 1234576, 1311737, 1499128, 2623474, 2998256, 5246948, 10493896, 20987792]

約数ペア:

[(1, 20987792), (2, 10493896), (4, 5246948), (7, 2998256), (8, 2623474), (14, 1499128), (16, 1311737), (17, 1234576), (28, 749564), (34, 617288), (56, 374782), (68, 308644), (73, 287504), (112, 187391), (119, 176368), (136, 154322), (146, 143752), (151, 138992), (238, 88184), (272, 77161), (292, 71876), (302, 69496), (476, 44092), (511, 41072), (584, 35938), (604, 34748), (952, 22046), (1022, 20536), (1057, 19856), (1168, 17969), (1208, 17374), (1241, 16912), (1904, 11023), (2044, 10268), (2114, 9928), (2416, 8687), (2482, 8456), (2567, 8176), (4088, 5134), (4228, 4964)]