20885810

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{421}}^1$

素因数の和:491

約数の個数: 48

約数和(自身を含む): 42431256

約数和(自身を除く): 21545446

約数列:

[1, 2, 5, 10, 11, 22, 41, 55, 82, 110, 121, 205, 242, 410, 421, 451, 605, 842, 902, 1210, 2105, 2255, 4210, 4510, 4631, 4961, 9262, 9922, 17261, 23155, 24805, 34522, 46310, 49610, 50941, 86305, 101882, 172610, 189871, 254705, 379742, 509410, 949355, 1898710, 2088581, 4177162, 10442905, 20885810]

約数ペア:

[(1, 20885810), (2, 10442905), (5, 4177162), (10, 2088581), (11, 1898710), (22, 949355), (41, 509410), (55, 379742), (82, 254705), (110, 189871), (121, 172610), (205, 101882), (242, 86305), (410, 50941), (421, 49610), (451, 46310), (605, 34522), (842, 24805), (902, 23155), (1210, 17261), (2105, 9922), (2255, 9262), (4210, 4961), (4510, 4631)]