81565960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{9397}}^1$

素因数の和:9446

約数の個数: 64

約数和(自身を含む): 216529920

約数和(自身を除く): 134963960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 4340, 8680, 9397, 18794, 37588, 46985, 65779, 75176, 93970, 131558, 187940, 263116, 291307, 328895, 375880, 526232, 582614, 657790, 1165228, 1315580, 1456535, 2039149, 2330456, 2631160, 2913070, 4078298, 5826140, 8156596, 10195745, 11652280, 16313192, 20391490, 40782980, 81565960]

約数ペア:

[(1, 81565960), (2, 40782980), (4, 20391490), (5, 16313192), (7, 11652280), (8, 10195745), (10, 8156596), (14, 5826140), (20, 4078298), (28, 2913070), (31, 2631160), (35, 2330456), (40, 2039149), (56, 1456535), (62, 1315580), (70, 1165228), (124, 657790), (140, 582614), (155, 526232), (217, 375880), (248, 328895), (280, 291307), (310, 263116), (434, 187940), (620, 131558), (868, 93970), (1085, 75176), (1240, 65779), (1736, 46985), (2170, 37588), (4340, 18794), (8680, 9397)]