391903490

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{40031}}^1$

素因数の和:40138

約数の個数: 32

約数和(自身を含む): 778222080

約数和(自身を除く): 386318590

約数列:

[1, 2, 5, 10, 11, 22, 55, 89, 110, 178, 445, 890, 979, 1958, 4895, 9790, 40031, 80062, 200155, 400310, 440341, 880682, 2201705, 3562759, 4403410, 7125518, 17813795, 35627590, 39190349, 78380698, 195951745, 391903490]

約数ペア:

[(1, 391903490), (2, 195951745), (5, 78380698), (10, 39190349), (11, 35627590), (22, 17813795), (55, 7125518), (89, 4403410), (110, 3562759), (178, 2201705), (445, 880682), (890, 440341), (979, 400310), (1958, 200155), (4895, 80062), (9790, 40031)]