20605420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{409}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 47527200

約数和(自身を除く): 26921780

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 229, 409, 458, 818, 916, 1145, 1636, 2045, 2290, 2519, 4090, 4499, 4580, 5038, 8180, 8998, 10076, 12595, 17996, 22495, 25190, 44990, 50380, 89980, 93661, 187322, 374644, 468305, 936610, 1030271, 1873220, 2060542, 4121084, 5151355, 10302710, 20605420]

約数ペア:

[(1, 20605420), (2, 10302710), (4, 5151355), (5, 4121084), (10, 2060542), (11, 1873220), (20, 1030271), (22, 936610), (44, 468305), (55, 374644), (110, 187322), (220, 93661), (229, 89980), (409, 50380), (458, 44990), (818, 25190), (916, 22495), (1145, 17996), (1636, 12595), (2045, 10076), (2290, 8998), (2519, 8180), (4090, 5038), (4499, 4580)]