81263920

素因数分解:

$2^4\times 5^1\times {\mathrm{443}}^1\times {\mathrm{2293}}^1$

素因数の和:2749

約数の個数: 40

約数和(自身を含む): 189447696

約数和(自身を除く): 108183776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 443, 886, 1772, 2215, 2293, 3544, 4430, 4586, 7088, 8860, 9172, 11465, 17720, 18344, 22930, 35440, 36688, 45860, 91720, 183440, 1015799, 2031598, 4063196, 5078995, 8126392, 10157990, 16252784, 20315980, 40631960, 81263920]

約数ペア:

[(1, 81263920), (2, 40631960), (4, 20315980), (5, 16252784), (8, 10157990), (10, 8126392), (16, 5078995), (20, 4063196), (40, 2031598), (80, 1015799), (443, 183440), (886, 91720), (1772, 45860), (2215, 36688), (2293, 35440), (3544, 22930), (4430, 18344), (4586, 17720), (7088, 11465), (8860, 9172)]