21386530

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{977}}^1$

素因数の和:1194

約数の個数: 32

約数和(自身を含む): 42249600

約数和(自身を除く): 20863070

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 199, 398, 977, 995, 1954, 1990, 2189, 4378, 4885, 9770, 10747, 10945, 21494, 21890, 53735, 107470, 194423, 388846, 972115, 1944230, 2138653, 4277306, 10693265, 21386530]

約数ペア:

[(1, 21386530), (2, 10693265), (5, 4277306), (10, 2138653), (11, 1944230), (22, 972115), (55, 388846), (110, 194423), (199, 107470), (398, 53735), (977, 21890), (995, 21494), (1954, 10945), (1990, 10747), (2189, 9770), (4378, 4885)]