21217845

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{5591}}^1$

素因数の和:5633

約数の個数: 32

約数和(自身を含む): 38651904

約数和(自身を除く): 17434059

約数列:

[1, 3, 5, 11, 15, 23, 33, 55, 69, 115, 165, 253, 345, 759, 1265, 3795, 5591, 16773, 27955, 61501, 83865, 128593, 184503, 307505, 385779, 642965, 922515, 1414523, 1928895, 4243569, 7072615, 21217845]

約数ペア:

[(1, 21217845), (3, 7072615), (5, 4243569), (11, 1928895), (15, 1414523), (23, 922515), (33, 642965), (55, 385779), (69, 307505), (115, 184503), (165, 128593), (253, 83865), (345, 61501), (759, 27955), (1265, 16773), (3795, 5591)]