21057963560

素因数分解:

$2^3\times 5^1\times {\mathrm{15787}}^1\times {\mathrm{33347}}^1$

素因数の和:49145

約数の個数: 32

約数和(自身を含む): 47384840160

約数和(自身を除く): 26326876600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 15787, 31574, 33347, 63148, 66694, 78935, 126296, 133388, 157870, 166735, 266776, 315740, 333470, 631480, 666940, 1333880, 526449089, 1052898178, 2105796356, 2632245445, 4211592712, 5264490890, 10528981780, 21057963560]

約数ペア:

[(1, 21057963560), (2, 10528981780), (4, 5264490890), (5, 4211592712), (8, 2632245445), (10, 2105796356), (20, 1052898178), (40, 526449089), (15787, 1333880), (31574, 666940), (33347, 631480), (63148, 333470), (66694, 315740), (78935, 266776), (126296, 166735), (133388, 157870)]