644481140

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{857}}^1\times {\mathrm{1979}}^1$

素因数の和:2864

約数の個数: 48

約数和(自身を含む): 1427025600

約数和(自身を除く): 782544460

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 857, 1714, 1979, 3428, 3958, 4285, 7916, 8570, 9895, 16283, 17140, 19790, 32566, 37601, 39580, 65132, 75202, 81415, 150404, 162830, 188005, 325660, 376010, 752020, 1696003, 3392006, 6784012, 8480015, 16960030, 32224057, 33920060, 64448114, 128896228, 161120285, 322240570, 644481140]

約数ペア:

[(1, 644481140), (2, 322240570), (4, 161120285), (5, 128896228), (10, 64448114), (19, 33920060), (20, 32224057), (38, 16960030), (76, 8480015), (95, 6784012), (190, 3392006), (380, 1696003), (857, 752020), (1714, 376010), (1979, 325660), (3428, 188005), (3958, 162830), (4285, 150404), (7916, 81415), (8570, 75202), (9895, 65132), (16283, 39580), (17140, 37601), (19790, 32566)]