20977978

素因数分解:

$2^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{227}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 39299904

約数和(自身を除く): 18321926

約数列:

[1, 2, 7, 14, 23, 41, 46, 49, 82, 98, 161, 227, 287, 322, 454, 574, 943, 1127, 1589, 1886, 2009, 2254, 3178, 4018, 5221, 6601, 9307, 10442, 11123, 13202, 18614, 22246, 36547, 46207, 65149, 73094, 92414, 130298, 214061, 255829, 428122, 456043, 511658, 912086, 1498427, 2996854, 10488989, 20977978]

約数ペア:

[(1, 20977978), (2, 10488989), (7, 2996854), (14, 1498427), (23, 912086), (41, 511658), (46, 456043), (49, 428122), (82, 255829), (98, 214061), (161, 130298), (227, 92414), (287, 73094), (322, 65149), (454, 46207), (574, 36547), (943, 22246), (1127, 18614), (1589, 13202), (1886, 11123), (2009, 10442), (2254, 9307), (3178, 6601), (4018, 5221)]