256694980

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{307}}^1\times {\mathrm{431}}^1$

素因数の和:844

約数の個数: 48

約数和(自身を含む): 547658496

約数和(自身を除く): 290963516

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 307, 388, 431, 485, 614, 862, 970, 1228, 1535, 1724, 1940, 2155, 3070, 4310, 6140, 8620, 29779, 41807, 59558, 83614, 119116, 132317, 148895, 167228, 209035, 264634, 297790, 418070, 529268, 595580, 661585, 836140, 1323170, 2646340, 12834749, 25669498, 51338996, 64173745, 128347490, 256694980]

約数ペア:

[(1, 256694980), (2, 128347490), (4, 64173745), (5, 51338996), (10, 25669498), (20, 12834749), (97, 2646340), (194, 1323170), (307, 836140), (388, 661585), (431, 595580), (485, 529268), (614, 418070), (862, 297790), (970, 264634), (1228, 209035), (1535, 167228), (1724, 148895), (1940, 132317), (2155, 119116), (3070, 83614), (4310, 59558), (6140, 41807), (8620, 29779)]