21820264

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{463}}^1$

素因数の和:649

約数の個数: 32

約数和(自身を含む): 42261120

約数和(自身を除く): 20440856

約数列:

[1, 2, 4, 8, 43, 86, 137, 172, 274, 344, 463, 548, 926, 1096, 1852, 3704, 5891, 11782, 19909, 23564, 39818, 47128, 63431, 79636, 126862, 159272, 253724, 507448, 2727533, 5455066, 10910132, 21820264]

約数ペア:

[(1, 21820264), (2, 10910132), (4, 5455066), (8, 2727533), (43, 507448), (86, 253724), (137, 159272), (172, 126862), (274, 79636), (344, 63431), (463, 47128), (548, 39818), (926, 23564), (1096, 19909), (1852, 11782), (3704, 5891)]