21563178

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{541}}^1$

素因数の和:639

約数の個数: 64

約数和(自身を含む): 53905152

約数和(自身を除く): 32341974

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 39, 42, 73, 78, 91, 146, 182, 219, 273, 438, 511, 541, 546, 949, 1022, 1082, 1533, 1623, 1898, 2847, 3066, 3246, 3787, 5694, 6643, 7033, 7574, 11361, 13286, 14066, 19929, 21099, 22722, 39493, 39858, 42198, 49231, 78986, 98462, 118479, 147693, 236958, 276451, 295386, 513409, 552902, 829353, 1026818, 1540227, 1658706, 3080454, 3593863, 7187726, 10781589, 21563178]

約数ペア:

[(1, 21563178), (2, 10781589), (3, 7187726), (6, 3593863), (7, 3080454), (13, 1658706), (14, 1540227), (21, 1026818), (26, 829353), (39, 552902), (42, 513409), (73, 295386), (78, 276451), (91, 236958), (146, 147693), (182, 118479), (219, 98462), (273, 78986), (438, 49231), (511, 42198), (541, 39858), (546, 39493), (949, 22722), (1022, 21099), (1082, 19929), (1533, 14066), (1623, 13286), (1898, 11361), (2847, 7574), (3066, 7033), (3246, 6643), (3787, 5694)]