20215335088

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{406649}}^1$

素因数の和:406909

約数の個数: 40

約数和(自身を含む): 42356664000

約数和(自身を除く): 22141328912

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 239, 478, 956, 1912, 3107, 3824, 6214, 12428, 24856, 49712, 406649, 813298, 1626596, 3253192, 5286437, 6506384, 10572874, 21145748, 42291496, 84582992, 97189111, 194378222, 388756444, 777512888, 1263458443, 1555025776, 2526916886, 5053833772, 10107667544, 20215335088]

約数ペア:

[(1, 20215335088), (2, 10107667544), (4, 5053833772), (8, 2526916886), (13, 1555025776), (16, 1263458443), (26, 777512888), (52, 388756444), (104, 194378222), (208, 97189111), (239, 84582992), (478, 42291496), (956, 21145748), (1912, 10572874), (3107, 6506384), (3824, 5286437), (6214, 3253192), (12428, 1626596), (24856, 813298), (49712, 406649)]