81338560

素因数分解:

$2^6\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1619}}^1$

素因数の和:1793

約数の個数: 56

約数和(自身を含む): 195041520

約数和(自身を除く): 113702960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 157, 160, 314, 320, 628, 785, 1256, 1570, 1619, 2512, 3140, 3238, 5024, 6280, 6476, 8095, 10048, 12560, 12952, 16190, 25120, 25904, 32380, 50240, 51808, 64760, 103616, 129520, 254183, 259040, 508366, 518080, 1016732, 1270915, 2033464, 2541830, 4066928, 5083660, 8133856, 10167320, 16267712, 20334640, 40669280, 81338560]

約数ペア:

[(1, 81338560), (2, 40669280), (4, 20334640), (5, 16267712), (8, 10167320), (10, 8133856), (16, 5083660), (20, 4066928), (32, 2541830), (40, 2033464), (64, 1270915), (80, 1016732), (157, 518080), (160, 508366), (314, 259040), (320, 254183), (628, 129520), (785, 103616), (1256, 64760), (1570, 51808), (1619, 50240), (2512, 32380), (3140, 25904), (3238, 25120), (5024, 16190), (6280, 12952), (6476, 12560), (8095, 10048)]