20180258980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{811}}^1\times {\mathrm{25391}}^1$

素因数の和:26225

約数の個数: 72

約数和(自身を含む): 49360219776

約数和(自身を除く): 29179960796

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 811, 980, 1622, 3244, 4055, 5677, 8110, 11354, 16220, 22708, 25391, 28385, 39739, 50782, 56770, 79478, 101564, 113540, 126955, 158956, 177737, 198695, 253910, 355474, 397390, 507820, 710948, 794780, 888685, 1244159, 1777370, 2488318, 3554740, 4976636, 6220795, 12441590, 20592101, 24883180, 41184202, 82368404, 102960505, 144144707, 205921010, 288289414, 411842020, 576578828, 720723535, 1009012949, 1441447070, 2018025898, 2882894140, 4036051796, 5045064745, 10090129490, 20180258980]

約数ペア:

[(1, 20180258980), (2, 10090129490), (4, 5045064745), (5, 4036051796), (7, 2882894140), (10, 2018025898), (14, 1441447070), (20, 1009012949), (28, 720723535), (35, 576578828), (49, 411842020), (70, 288289414), (98, 205921010), (140, 144144707), (196, 102960505), (245, 82368404), (490, 41184202), (811, 24883180), (980, 20592101), (1622, 12441590), (3244, 6220795), (4055, 4976636), (5677, 3554740), (8110, 2488318), (11354, 1777370), (16220, 1244159), (22708, 888685), (25391, 794780), (28385, 710948), (39739, 507820), (50782, 397390), (56770, 355474), (79478, 253910), (101564, 198695), (113540, 177737), (126955, 158956)]