661330659998

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{383}}^1\times {\mathrm{639997}}^1$

素因数の和:640472

約数の個数: 32

約数和(自身を含む): 1061679882240

約数和(自身を除く): 400349222242

約数列:

[1, 2, 19, 38, 71, 142, 383, 766, 1349, 2698, 7277, 14554, 27193, 54386, 516667, 639997, 1033334, 1279994, 12159943, 24319886, 45439787, 90879574, 245118851, 490237702, 863355953, 1726711906, 4657258169, 9314516338, 17403438421, 34806876842, 330665329999, 661330659998]

約数ペア:

[(1, 661330659998), (2, 330665329999), (19, 34806876842), (38, 17403438421), (71, 9314516338), (142, 4657258169), (383, 1726711906), (766, 863355953), (1349, 490237702), (2698, 245118851), (7277, 90879574), (14554, 45439787), (27193, 24319886), (54386, 12159943), (516667, 1279994), (639997, 1033334)]