21000950272

素因数分解:

$2^9\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{1999}}^1$

素因数の和:2122

約数の個数: 120

約数和(自身を含む): 45224784000

約数和(自身を除く): 24223833728

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 64, 68, 71, 128, 136, 142, 256, 272, 284, 289, 512, 544, 568, 578, 1088, 1136, 1156, 1207, 1999, 2176, 2272, 2312, 2414, 3998, 4352, 4544, 4624, 4828, 7996, 8704, 9088, 9248, 9656, 15992, 18176, 18496, 19312, 20519, 31984, 33983, 36352, 36992, 38624, 41038, 63968, 67966, 73984, 77248, 82076, 127936, 135932, 141929, 147968, 154496, 164152, 255872, 271864, 283858, 308992, 328304, 511744, 543728, 567716, 577711, 617984, 656608, 1023488, 1087456, 1135432, 1155422, 1313216, 2174912, 2270864, 2310844, 2412793, 2626432, 4349824, 4541728, 4621688, 4825586, 5252864, 8699648, 9083456, 9243376, 9651172, 10505728, 17399296, 18166912, 18486752, 19302344, 36333824, 36973504, 38604688, 41017481, 72667648, 73947008, 77209376, 82034962, 147894016, 154418752, 164069924, 295788032, 308837504, 328139848, 617675008, 656279696, 1235350016, 1312559392, 2625118784, 5250237568, 10500475136, 21000950272]

約数ペア:

[(1, 21000950272), (2, 10500475136), (4, 5250237568), (8, 2625118784), (16, 1312559392), (17, 1235350016), (32, 656279696), (34, 617675008), (64, 328139848), (68, 308837504), (71, 295788032), (128, 164069924), (136, 154418752), (142, 147894016), (256, 82034962), (272, 77209376), (284, 73947008), (289, 72667648), (512, 41017481), (544, 38604688), (568, 36973504), (578, 36333824), (1088, 19302344), (1136, 18486752), (1156, 18166912), (1207, 17399296), (1999, 10505728), (2176, 9651172), (2272, 9243376), (2312, 9083456), (2414, 8699648), (3998, 5252864), (4352, 4825586), (4544, 4621688), (4624, 4541728), (4828, 4349824), (7996, 2626432), (8704, 2412793), (9088, 2310844), (9248, 2270864), (9656, 2174912), (15992, 1313216), (18176, 1155422), (18496, 1135432), (19312, 1087456), (20519, 1023488), (31984, 656608), (33983, 617984), (36352, 577711), (36992, 567716), (38624, 543728), (41038, 511744), (63968, 328304), (67966, 308992), (73984, 283858), (77248, 271864), (82076, 255872), (127936, 164152), (135932, 154496), (141929, 147968)]