21394527

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{131}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 36837504

約数和(自身を除く): 15442977

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 101, 131, 147, 231, 303, 393, 539, 707, 917, 1111, 1441, 1617, 2121, 2751, 3333, 4323, 4949, 6419, 7777, 10087, 13231, 14847, 19257, 23331, 30261, 39693, 54439, 70609, 92617, 145541, 163317, 211827, 277851, 436623, 648319, 1018787, 1944957, 3056361, 7131509, 21394527]

約数ペア:

[(1, 21394527), (3, 7131509), (7, 3056361), (11, 1944957), (21, 1018787), (33, 648319), (49, 436623), (77, 277851), (101, 211827), (131, 163317), (147, 145541), (231, 92617), (303, 70609), (393, 54439), (539, 39693), (707, 30261), (917, 23331), (1111, 19257), (1441, 14847), (1617, 13231), (2121, 10087), (2751, 7777), (3333, 6419), (4323, 4949)]