20887893

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{443}}^1$

素因数の和:506

約数の個数: 36

約数和(自身を含む): 33800832

約数和(自身を除く): 12912939

約数列:

[1, 3, 9, 13, 31, 39, 93, 117, 169, 279, 403, 443, 507, 1209, 1329, 1521, 3627, 3987, 5239, 5759, 13733, 15717, 17277, 41199, 47151, 51831, 74867, 123597, 178529, 224601, 535587, 673803, 1606761, 2320877, 6962631, 20887893]

約数ペア:

[(1, 20887893), (3, 6962631), (9, 2320877), (13, 1606761), (31, 673803), (39, 535587), (93, 224601), (117, 178529), (169, 123597), (279, 74867), (403, 51831), (443, 47151), (507, 41199), (1209, 17277), (1329, 15717), (1521, 13733), (3627, 5759), (3987, 5239)]