20931620

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{239}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 45964800

約数和(自身を除く): 25033180

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 151, 239, 290, 302, 478, 580, 604, 755, 956, 1195, 1510, 2390, 3020, 4379, 4780, 6931, 8758, 13862, 17516, 21895, 27724, 34655, 36089, 43790, 69310, 72178, 87580, 138620, 144356, 180445, 360890, 721780, 1046581, 2093162, 4186324, 5232905, 10465810, 20931620]

約数ペア:

[(1, 20931620), (2, 10465810), (4, 5232905), (5, 4186324), (10, 2093162), (20, 1046581), (29, 721780), (58, 360890), (116, 180445), (145, 144356), (151, 138620), (239, 87580), (290, 72178), (302, 69310), (478, 43790), (580, 36089), (604, 34655), (755, 27724), (956, 21895), (1195, 17516), (1510, 13862), (2390, 8758), (3020, 6931), (4379, 4780)]