21314320

素因数分解:

$2^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1697}}^1$

素因数の和:1867

約数の個数: 40

約数和(自身を含む): 49900824

約数和(自身を除く): 28586504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 157, 314, 628, 785, 1256, 1570, 1697, 2512, 3140, 3394, 6280, 6788, 8485, 12560, 13576, 16970, 27152, 33940, 67880, 135760, 266429, 532858, 1065716, 1332145, 2131432, 2664290, 4262864, 5328580, 10657160, 21314320]

約数ペア:

[(1, 21314320), (2, 10657160), (4, 5328580), (5, 4262864), (8, 2664290), (10, 2131432), (16, 1332145), (20, 1065716), (40, 532858), (80, 266429), (157, 135760), (314, 67880), (628, 33940), (785, 27152), (1256, 16970), (1570, 13576), (1697, 12560), (2512, 8485), (3140, 6788), (3394, 6280)]