21025345

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{199}}^1$

素因数の和:345

約数の個数: 32

約数和(自身を含む): 29548800

約数和(自身を除く): 8523455

約数列:

[1, 5, 11, 17, 55, 85, 113, 187, 199, 565, 935, 995, 1243, 1921, 2189, 3383, 6215, 9605, 10945, 16915, 21131, 22487, 37213, 105655, 112435, 186065, 247357, 382279, 1236785, 1911395, 4205069, 21025345]

約数ペア:

[(1, 21025345), (5, 4205069), (11, 1911395), (17, 1236785), (55, 382279), (85, 247357), (113, 186065), (187, 112435), (199, 105655), (565, 37213), (935, 22487), (995, 21131), (1243, 16915), (1921, 10945), (2189, 9605), (3383, 6215)]