639951588

素因数分解:

$2^2\times 3^2\times {\mathrm{257}}^1\times {\mathrm{263}}^2$

素因数の和:793

約数の個数: 54

約数和(自身を含む): 1630147974

約数和(自身を除く): 990196386

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 257, 263, 514, 526, 771, 789, 1028, 1052, 1542, 1578, 2313, 2367, 3084, 3156, 4626, 4734, 9252, 9468, 67591, 69169, 135182, 138338, 202773, 207507, 270364, 276676, 405546, 415014, 608319, 622521, 811092, 830028, 1216638, 1245042, 2433276, 2490084, 17776433, 35552866, 53329299, 71105732, 106658598, 159987897, 213317196, 319975794, 639951588]

約数ペア:

[(1, 639951588), (2, 319975794), (3, 213317196), (4, 159987897), (6, 106658598), (9, 71105732), (12, 53329299), (18, 35552866), (36, 17776433), (257, 2490084), (263, 2433276), (514, 1245042), (526, 1216638), (771, 830028), (789, 811092), (1028, 622521), (1052, 608319), (1542, 415014), (1578, 405546), (2313, 276676), (2367, 270364), (3084, 207507), (3156, 202773), (4626, 138338), (4734, 135182), (9252, 69169), (9468, 67591)]