21345664

素因数分解:

$2^7\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 45777600

約数和(自身を除く): 24431936

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 64, 67, 76, 128, 131, 134, 152, 262, 268, 304, 524, 536, 608, 1048, 1072, 1216, 1273, 2096, 2144, 2432, 2489, 2546, 4192, 4288, 4978, 5092, 8384, 8576, 8777, 9956, 10184, 16768, 17554, 19912, 20368, 35108, 39824, 40736, 70216, 79648, 81472, 140432, 159296, 162944, 166763, 280864, 318592, 333526, 561728, 667052, 1123456, 1334104, 2668208, 5336416, 10672832, 21345664]

約数ペア:

[(1, 21345664), (2, 10672832), (4, 5336416), (8, 2668208), (16, 1334104), (19, 1123456), (32, 667052), (38, 561728), (64, 333526), (67, 318592), (76, 280864), (128, 166763), (131, 162944), (134, 159296), (152, 140432), (262, 81472), (268, 79648), (304, 70216), (524, 40736), (536, 39824), (608, 35108), (1048, 20368), (1072, 19912), (1216, 17554), (1273, 16768), (2096, 10184), (2144, 9956), (2432, 8777), (2489, 8576), (2546, 8384), (4192, 5092), (4288, 4978)]