21064616

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{997}}^1$

素因数の和:1161

約数の個数: 32

約数和(自身を含む): 41916000

約数和(自身を除く): 20851384

約数列:

[1, 2, 4, 8, 19, 38, 76, 139, 152, 278, 556, 997, 1112, 1994, 2641, 3988, 5282, 7976, 10564, 18943, 21128, 37886, 75772, 138583, 151544, 277166, 554332, 1108664, 2633077, 5266154, 10532308, 21064616]

約数ペア:

[(1, 21064616), (2, 10532308), (4, 5266154), (8, 2633077), (19, 1108664), (38, 554332), (76, 277166), (139, 151544), (152, 138583), (278, 75772), (556, 37886), (997, 21128), (1112, 18943), (1994, 10564), (2641, 7976), (3988, 5282)]