21659392

素因数分解:

$2^8\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:169

約数の個数: 72

約数和(自身を含む): 46889360

約数和(自身を除く): 25229968

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 61, 64, 73, 76, 122, 128, 146, 152, 244, 256, 292, 304, 488, 584, 608, 976, 1159, 1168, 1216, 1387, 1952, 2318, 2336, 2432, 2774, 3904, 4453, 4636, 4672, 4864, 5548, 7808, 8906, 9272, 9344, 11096, 15616, 17812, 18544, 18688, 22192, 35624, 37088, 44384, 71248, 74176, 84607, 88768, 142496, 148352, 169214, 177536, 284992, 296704, 338428, 355072, 569984, 676856, 1139968, 1353712, 2707424, 5414848, 10829696, 21659392]

約数ペア:

[(1, 21659392), (2, 10829696), (4, 5414848), (8, 2707424), (16, 1353712), (19, 1139968), (32, 676856), (38, 569984), (61, 355072), (64, 338428), (73, 296704), (76, 284992), (122, 177536), (128, 169214), (146, 148352), (152, 142496), (244, 88768), (256, 84607), (292, 74176), (304, 71248), (488, 44384), (584, 37088), (608, 35624), (976, 22192), (1159, 18688), (1168, 18544), (1216, 17812), (1387, 15616), (1952, 11096), (2318, 9344), (2336, 9272), (2432, 8906), (2774, 7808), (3904, 5548), (4453, 4864), (4636, 4672)]