21553220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{4363}}^1$

素因数の和:4404

約数の個数: 48

約数和(自身を含む): 51320640

約数和(自身を除く): 29767420

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4363, 4940, 8726, 17452, 21815, 43630, 56719, 82897, 87260, 113438, 165794, 226876, 283595, 331588, 414485, 567190, 828970, 1077661, 1134380, 1657940, 2155322, 4310644, 5388305, 10776610, 21553220]

約数ペア:

[(1, 21553220), (2, 10776610), (4, 5388305), (5, 4310644), (10, 2155322), (13, 1657940), (19, 1134380), (20, 1077661), (26, 828970), (38, 567190), (52, 414485), (65, 331588), (76, 283595), (95, 226876), (130, 165794), (190, 113438), (247, 87260), (260, 82897), (380, 56719), (494, 43630), (988, 21815), (1235, 17452), (2470, 8726), (4363, 4940)]