21187439

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{191}}^1$

素因数の和:287

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 6681745

約数列:

[1, 7, 13, 23, 53, 91, 161, 191, 299, 371, 689, 1219, 1337, 2093, 2483, 4393, 4823, 8533, 10123, 15847, 17381, 30751, 57109, 70861, 110929, 131599, 232829, 399763, 921193, 1629803, 3026777, 21187439]

約数ペア:

[(1, 21187439), (7, 3026777), (13, 1629803), (23, 921193), (53, 399763), (91, 232829), (161, 131599), (191, 110929), (299, 70861), (371, 57109), (689, 30751), (1219, 17381), (1337, 15847), (2093, 10123), (2483, 8533), (4393, 4823)]