20557880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73421}}^1$

素因数の和:73439

約数の個数: 32

約数和(自身を含む): 52863840

約数和(自身を除く): 32305960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 73421, 146842, 293684, 367105, 513947, 587368, 734210, 1027894, 1468420, 2055788, 2569735, 2936840, 4111576, 5139470, 10278940, 20557880]

約数ペア:

[(1, 20557880), (2, 10278940), (4, 5139470), (5, 4111576), (7, 2936840), (8, 2569735), (10, 2055788), (14, 1468420), (20, 1027894), (28, 734210), (35, 587368), (40, 513947), (56, 367105), (70, 293684), (140, 146842), (280, 73421)]