78578920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{280639}}^1$

素因数の和:280657

約数の個数: 32

約数和(自身を含む): 202060800

約数和(自身を除く): 123481880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 280639, 561278, 1122556, 1403195, 1964473, 2245112, 2806390, 3928946, 5612780, 7857892, 9822365, 11225560, 15715784, 19644730, 39289460, 78578920]

約数ペア:

[(1, 78578920), (2, 39289460), (4, 19644730), (5, 15715784), (7, 11225560), (8, 9822365), (10, 7857892), (14, 5612780), (20, 3928946), (28, 2806390), (35, 2245112), (40, 1964473), (56, 1403195), (70, 1122556), (140, 561278), (280, 280639)]