19746440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{647}}^1$

素因数の和:774

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 31575160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 647, 763, 872, 1090, 1294, 1526, 2180, 2588, 3052, 3235, 3815, 4360, 4529, 5176, 6104, 6470, 7630, 9058, 12940, 15260, 18116, 22645, 25880, 30520, 36232, 45290, 70523, 90580, 141046, 181160, 282092, 352615, 493661, 564184, 705230, 987322, 1410460, 1974644, 2468305, 2820920, 3949288, 4936610, 9873220, 19746440]

約数ペア:

[(1, 19746440), (2, 9873220), (4, 4936610), (5, 3949288), (7, 2820920), (8, 2468305), (10, 1974644), (14, 1410460), (20, 987322), (28, 705230), (35, 564184), (40, 493661), (56, 352615), (70, 282092), (109, 181160), (140, 141046), (218, 90580), (280, 70523), (436, 45290), (545, 36232), (647, 30520), (763, 25880), (872, 22645), (1090, 18116), (1294, 15260), (1526, 12940), (2180, 9058), (2588, 7630), (3052, 6470), (3235, 6104), (3815, 5176), (4360, 4529)]