21720894

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{691}}^1$

素因数の和:753

約数の個数: 48

約数和(自身を含む): 48628224

約数和(自身を除く): 26907330

約数列:

[1, 2, 3, 6, 13, 26, 31, 39, 62, 78, 93, 169, 186, 338, 403, 507, 691, 806, 1014, 1209, 1382, 2073, 2418, 4146, 5239, 8983, 10478, 15717, 17966, 21421, 26949, 31434, 42842, 53898, 64263, 116779, 128526, 233558, 278473, 350337, 556946, 700674, 835419, 1670838, 3620149, 7240298, 10860447, 21720894]

約数ペア:

[(1, 21720894), (2, 10860447), (3, 7240298), (6, 3620149), (13, 1670838), (26, 835419), (31, 700674), (39, 556946), (62, 350337), (78, 278473), (93, 233558), (169, 128526), (186, 116779), (338, 64263), (403, 53898), (507, 42842), (691, 31434), (806, 26949), (1014, 21421), (1209, 17966), (1382, 15717), (2073, 10478), (2418, 8983), (4146, 5239)]