21881312

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1$

素因数の和:148

約数の個数: 96

約数和(自身を含む): 50349600

約数和(自身を除く): 28468288

約数列:

[1, 2, 4, 8, 16, 17, 19, 29, 32, 34, 38, 58, 68, 73, 76, 116, 136, 146, 152, 232, 272, 292, 304, 323, 464, 493, 544, 551, 584, 608, 646, 928, 986, 1102, 1168, 1241, 1292, 1387, 1972, 2117, 2204, 2336, 2482, 2584, 2774, 3944, 4234, 4408, 4964, 5168, 5548, 7888, 8468, 8816, 9367, 9928, 10336, 11096, 15776, 16936, 17632, 18734, 19856, 22192, 23579, 33872, 35989, 37468, 39712, 40223, 44384, 47158, 67744, 71978, 74936, 80446, 94316, 143956, 149872, 160892, 188632, 287912, 299744, 321784, 377264, 575824, 643568, 683791, 754528, 1151648, 1287136, 1367582, 2735164, 5470328, 10940656, 21881312]

約数ペア:

[(1, 21881312), (2, 10940656), (4, 5470328), (8, 2735164), (16, 1367582), (17, 1287136), (19, 1151648), (29, 754528), (32, 683791), (34, 643568), (38, 575824), (58, 377264), (68, 321784), (73, 299744), (76, 287912), (116, 188632), (136, 160892), (146, 149872), (152, 143956), (232, 94316), (272, 80446), (292, 74936), (304, 71978), (323, 67744), (464, 47158), (493, 44384), (544, 40223), (551, 39712), (584, 37468), (608, 35989), (646, 33872), (928, 23579), (986, 22192), (1102, 19856), (1168, 18734), (1241, 17632), (1292, 16936), (1387, 15776), (1972, 11096), (2117, 10336), (2204, 9928), (2336, 9367), (2482, 8816), (2584, 8468), (2774, 7888), (3944, 5548), (4234, 5168), (4408, 4964)]