21517870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{983}}^1$

素因数の和:1200

約数の個数: 32

約数和(自身を含む): 42508800

約数和(自身を除く): 20990930

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 199, 398, 983, 995, 1966, 1990, 2189, 4378, 4915, 9830, 10813, 10945, 21626, 21890, 54065, 108130, 195617, 391234, 978085, 1956170, 2151787, 4303574, 10758935, 21517870]

約数ペア:

[(1, 21517870), (2, 10758935), (5, 4303574), (10, 2151787), (11, 1956170), (22, 978085), (55, 391234), (110, 195617), (199, 108130), (398, 54065), (983, 21890), (995, 21626), (1966, 10945), (1990, 10813), (2189, 9830), (4378, 4915)]