20402464

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:329

約数の個数: 48

約数和(自身を含む): 42045696

約数和(自身を除く): 21643232

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 124, 131, 157, 248, 262, 314, 496, 524, 628, 992, 1048, 1256, 2096, 2512, 4061, 4192, 4867, 5024, 8122, 9734, 16244, 19468, 20567, 32488, 38936, 41134, 64976, 77872, 82268, 129952, 155744, 164536, 329072, 637577, 658144, 1275154, 2550308, 5100616, 10201232, 20402464]

約数ペア:

[(1, 20402464), (2, 10201232), (4, 5100616), (8, 2550308), (16, 1275154), (31, 658144), (32, 637577), (62, 329072), (124, 164536), (131, 155744), (157, 129952), (248, 82268), (262, 77872), (314, 64976), (496, 41134), (524, 38936), (628, 32488), (992, 20567), (1048, 19468), (1256, 16244), (2096, 9734), (2512, 8122), (4061, 5024), (4192, 4867)]