20721816

素因数分解:

$2^3\times 3^2\times {\mathrm{277}}^1\times {\mathrm{1039}}^1$

素因数の和:1328

約数の個数: 48

約数和(自身を含む): 56378400

約数和(自身を除く): 35656584

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 277, 554, 831, 1039, 1108, 1662, 2078, 2216, 2493, 3117, 3324, 4156, 4986, 6234, 6648, 8312, 9351, 9972, 12468, 18702, 19944, 24936, 37404, 74808, 287803, 575606, 863409, 1151212, 1726818, 2302424, 2590227, 3453636, 5180454, 6907272, 10360908, 20721816]

約数ペア:

[(1, 20721816), (2, 10360908), (3, 6907272), (4, 5180454), (6, 3453636), (8, 2590227), (9, 2302424), (12, 1726818), (18, 1151212), (24, 863409), (36, 575606), (72, 287803), (277, 74808), (554, 37404), (831, 24936), (1039, 19944), (1108, 18702), (1662, 12468), (2078, 9972), (2216, 9351), (2493, 8312), (3117, 6648), (3324, 6234), (4156, 4986)]