257772530

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1\times {\mathrm{197}}^1$

素因数の和:443

約数の個数: 64

約数和(自身を含む): 508083840

約数和(自身を除く): 250311310

約数列:

[1, 2, 5, 10, 17, 34, 43, 85, 86, 170, 179, 197, 215, 358, 394, 430, 731, 895, 985, 1462, 1790, 1970, 3043, 3349, 3655, 6086, 6698, 7310, 7697, 8471, 15215, 15394, 16745, 16942, 30430, 33490, 35263, 38485, 42355, 70526, 76970, 84710, 130849, 144007, 176315, 261698, 288014, 352630, 599471, 654245, 720035, 1198942, 1308490, 1440070, 1516309, 2997355, 3032618, 5994710, 7581545, 15163090, 25777253, 51554506, 128886265, 257772530]

約数ペア:

[(1, 257772530), (2, 128886265), (5, 51554506), (10, 25777253), (17, 15163090), (34, 7581545), (43, 5994710), (85, 3032618), (86, 2997355), (170, 1516309), (179, 1440070), (197, 1308490), (215, 1198942), (358, 720035), (394, 654245), (430, 599471), (731, 352630), (895, 288014), (985, 261698), (1462, 176315), (1790, 144007), (1970, 130849), (3043, 84710), (3349, 76970), (3655, 70526), (6086, 42355), (6698, 38485), (7310, 35263), (7697, 33490), (8471, 30430), (15215, 16942), (15394, 16745)]