21878272

素因数分解:

$2^9\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1$

素因数の和:223

約数の個数: 80

約数和(自身を含む): 49840560

約数和(自身を除く): 27962288

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 32, 38, 52, 64, 76, 104, 128, 152, 173, 208, 247, 256, 304, 346, 416, 494, 512, 608, 692, 832, 988, 1216, 1384, 1664, 1976, 2249, 2432, 2768, 3287, 3328, 3952, 4498, 4864, 5536, 6574, 6656, 7904, 8996, 9728, 11072, 13148, 15808, 17992, 22144, 26296, 31616, 35984, 42731, 44288, 52592, 63232, 71968, 85462, 88576, 105184, 126464, 143936, 170924, 210368, 287872, 341848, 420736, 575744, 683696, 841472, 1151488, 1367392, 1682944, 2734784, 5469568, 10939136, 21878272]

約数ペア:

[(1, 21878272), (2, 10939136), (4, 5469568), (8, 2734784), (13, 1682944), (16, 1367392), (19, 1151488), (26, 841472), (32, 683696), (38, 575744), (52, 420736), (64, 341848), (76, 287872), (104, 210368), (128, 170924), (152, 143936), (173, 126464), (208, 105184), (247, 88576), (256, 85462), (304, 71968), (346, 63232), (416, 52592), (494, 44288), (512, 42731), (608, 35984), (692, 31616), (832, 26296), (988, 22144), (1216, 17992), (1384, 15808), (1664, 13148), (1976, 11072), (2249, 9728), (2432, 8996), (2768, 7904), (3287, 6656), (3328, 6574), (3952, 5536), (4498, 4864)]