20779880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{569}}^1$

素因数の和:674

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 30930520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 83, 88, 110, 166, 220, 332, 415, 440, 569, 664, 830, 913, 1138, 1660, 1826, 2276, 2845, 3320, 3652, 4552, 4565, 5690, 6259, 7304, 9130, 11380, 12518, 18260, 22760, 25036, 31295, 36520, 47227, 50072, 62590, 94454, 125180, 188908, 236135, 250360, 377816, 472270, 519497, 944540, 1038994, 1889080, 2077988, 2597485, 4155976, 5194970, 10389940, 20779880]

約数ペア:

[(1, 20779880), (2, 10389940), (4, 5194970), (5, 4155976), (8, 2597485), (10, 2077988), (11, 1889080), (20, 1038994), (22, 944540), (40, 519497), (44, 472270), (55, 377816), (83, 250360), (88, 236135), (110, 188908), (166, 125180), (220, 94454), (332, 62590), (415, 50072), (440, 47227), (569, 36520), (664, 31295), (830, 25036), (913, 22760), (1138, 18260), (1660, 12518), (1826, 11380), (2276, 9130), (2845, 7304), (3320, 6259), (3652, 5690), (4552, 4565)]