64408340

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{16183}}^1$

素因数の和:16391

約数の個数: 24

約数和(自身を含む): 135945600

約数和(自身を除く): 71537260

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 16183, 32366, 64732, 80915, 161830, 323660, 3220417, 6440834, 12881668, 16102085, 32204170, 64408340]

約数ペア:

[(1, 64408340), (2, 32204170), (4, 16102085), (5, 12881668), (10, 6440834), (20, 3220417), (199, 323660), (398, 161830), (796, 80915), (995, 64732), (1990, 32366), (3980, 16183)]