20399631

素因数分解:

$3^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{1901}}^1$

素因数の和:1991

約数の個数: 24

約数和(自身を含む): 32090544

約数和(自身を除く): 11690913

約数列:

[1, 3, 7, 21, 49, 73, 147, 219, 511, 1533, 1901, 3577, 5703, 10731, 13307, 39921, 93149, 138773, 279447, 416319, 971411, 2914233, 6799877, 20399631]

約数ペア:

[(1, 20399631), (3, 6799877), (7, 2914233), (21, 971411), (49, 416319), (73, 279447), (147, 138773), (219, 93149), (511, 39921), (1533, 13307), (1901, 10731), (3577, 5703)]