19647880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{1493}}^1$

素因数の和:1558

約数の個数: 64

約数和(自身を含む): 51632640

約数和(自身を除く): 31984760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 47, 56, 70, 94, 140, 188, 235, 280, 329, 376, 470, 658, 940, 1316, 1493, 1645, 1880, 2632, 2986, 3290, 5972, 6580, 7465, 10451, 11944, 13160, 14930, 20902, 29860, 41804, 52255, 59720, 70171, 83608, 104510, 140342, 209020, 280684, 350855, 418040, 491197, 561368, 701710, 982394, 1403420, 1964788, 2455985, 2806840, 3929576, 4911970, 9823940, 19647880]

約数ペア:

[(1, 19647880), (2, 9823940), (4, 4911970), (5, 3929576), (7, 2806840), (8, 2455985), (10, 1964788), (14, 1403420), (20, 982394), (28, 701710), (35, 561368), (40, 491197), (47, 418040), (56, 350855), (70, 280684), (94, 209020), (140, 140342), (188, 104510), (235, 83608), (280, 70171), (329, 59720), (376, 52255), (470, 41804), (658, 29860), (940, 20902), (1316, 14930), (1493, 13160), (1645, 11944), (1880, 10451), (2632, 7465), (2986, 6580), (3290, 5972)]