21468740

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^2\times {\mathrm{1117}}^1$

素因数の和:1188

約数の個数: 36

約数和(自身を含む): 46627308

約数和(自身を除く): 25158568

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 961, 1117, 1922, 2234, 3844, 4468, 4805, 5585, 9610, 11170, 19220, 22340, 34627, 69254, 138508, 173135, 346270, 692540, 1073437, 2146874, 4293748, 5367185, 10734370, 21468740]

約数ペア:

[(1, 21468740), (2, 10734370), (4, 5367185), (5, 4293748), (10, 2146874), (20, 1073437), (31, 692540), (62, 346270), (124, 173135), (155, 138508), (310, 69254), (620, 34627), (961, 22340), (1117, 19220), (1922, 11170), (2234, 9610), (3844, 5585), (4468, 4805)]