21287968

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{701}}^1$

素因数の和:797

約数の個数: 48

約数和(自身を含む): 45818136

約数和(自身を除く): 24530168

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 73, 104, 146, 208, 292, 416, 584, 701, 949, 1168, 1402, 1898, 2336, 2804, 3796, 5608, 7592, 9113, 11216, 15184, 18226, 22432, 30368, 36452, 51173, 72904, 102346, 145808, 204692, 291616, 409384, 665249, 818768, 1330498, 1637536, 2660996, 5321992, 10643984, 21287968]

約数ペア:

[(1, 21287968), (2, 10643984), (4, 5321992), (8, 2660996), (13, 1637536), (16, 1330498), (26, 818768), (32, 665249), (52, 409384), (73, 291616), (104, 204692), (146, 145808), (208, 102346), (292, 72904), (416, 51173), (584, 36452), (701, 30368), (949, 22432), (1168, 18226), (1402, 15184), (1898, 11216), (2336, 9113), (2804, 7592), (3796, 5608)]