20289424

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:403

約数の個数: 40

約数和(自身を含む): 40731768

約数和(自身を除く): 20442344

約数列:

[1, 2, 4, 8, 16, 41, 82, 157, 164, 197, 314, 328, 394, 628, 656, 788, 1256, 1576, 2512, 3152, 6437, 8077, 12874, 16154, 25748, 30929, 32308, 51496, 61858, 64616, 102992, 123716, 129232, 247432, 494864, 1268089, 2536178, 5072356, 10144712, 20289424]

約数ペア:

[(1, 20289424), (2, 10144712), (4, 5072356), (8, 2536178), (16, 1268089), (41, 494864), (82, 247432), (157, 129232), (164, 123716), (197, 102992), (314, 64616), (328, 61858), (394, 51496), (628, 32308), (656, 30929), (788, 25748), (1256, 16154), (1576, 12874), (2512, 8077), (3152, 6437)]