21439755

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:201

約数の個数: 64

約数和(自身を含む): 40550400

約数和(自身を除く): 19110645

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 47, 93, 109, 135, 141, 155, 235, 279, 327, 423, 465, 545, 705, 837, 981, 1269, 1395, 1457, 1635, 2115, 2943, 3379, 4185, 4371, 4905, 5123, 6345, 7285, 10137, 13113, 14715, 15369, 16895, 21855, 25615, 30411, 39339, 46107, 50685, 65565, 76845, 91233, 138321, 152055, 158813, 196695, 230535, 456165, 476439, 691605, 794065, 1429317, 2382195, 4287951, 7146585, 21439755]

約数ペア:

[(1, 21439755), (3, 7146585), (5, 4287951), (9, 2382195), (15, 1429317), (27, 794065), (31, 691605), (45, 476439), (47, 456165), (93, 230535), (109, 196695), (135, 158813), (141, 152055), (155, 138321), (235, 91233), (279, 76845), (327, 65565), (423, 50685), (465, 46107), (545, 39339), (705, 30411), (837, 25615), (981, 21855), (1269, 16895), (1395, 15369), (1457, 14715), (1635, 13113), (2115, 10137), (2943, 7285), (3379, 6345), (4185, 5123), (4371, 4905)]