19800885

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:214

約数の個数: 48

約数和(自身を含む): 35100864

約数和(自身を除く): 15299979

約数列:

[1, 3, 5, 13, 15, 39, 65, 73, 107, 169, 195, 219, 321, 365, 507, 535, 845, 949, 1095, 1391, 1605, 2535, 2847, 4173, 4745, 6955, 7811, 12337, 14235, 18083, 20865, 23433, 37011, 39055, 54249, 61685, 90415, 101543, 117165, 185055, 271245, 304629, 507715, 1320059, 1523145, 3960177, 6600295, 19800885]

約数ペア:

[(1, 19800885), (3, 6600295), (5, 3960177), (13, 1523145), (15, 1320059), (39, 507715), (65, 304629), (73, 271245), (107, 185055), (169, 117165), (195, 101543), (219, 90415), (321, 61685), (365, 54249), (507, 39055), (535, 37011), (845, 23433), (949, 20865), (1095, 18083), (1391, 14235), (1605, 12337), (2535, 7811), (2847, 6955), (4173, 4745)]