804976820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{499}}^1\times {\mathrm{1021}}^1$

素因数の和:1608

約数の個数: 48

約数和(自身を含む): 1716960000

約数和(自身を除く): 911983180

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 499, 790, 998, 1021, 1580, 1996, 2042, 2495, 4084, 4990, 5105, 9980, 10210, 20420, 39421, 78842, 80659, 157684, 161318, 197105, 322636, 394210, 403295, 509479, 788420, 806590, 1018958, 1613180, 2037916, 2547395, 5094790, 10189580, 40248841, 80497682, 160995364, 201244205, 402488410, 804976820]

約数ペア:

[(1, 804976820), (2, 402488410), (4, 201244205), (5, 160995364), (10, 80497682), (20, 40248841), (79, 10189580), (158, 5094790), (316, 2547395), (395, 2037916), (499, 1613180), (790, 1018958), (998, 806590), (1021, 788420), (1580, 509479), (1996, 403295), (2042, 394210), (2495, 322636), (4084, 197105), (4990, 161318), (5105, 157684), (9980, 80659), (10210, 78842), (20420, 39421)]