81272780

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{9173}}^1$

素因数の和:9625

約数の個数: 24

約数和(自身を含む): 171076752

約数和(自身を除く): 89803972

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 4430, 8860, 9173, 18346, 36692, 45865, 91730, 183460, 4063639, 8127278, 16254556, 20318195, 40636390, 81272780]

約数ペア:

[(1, 81272780), (2, 40636390), (4, 20318195), (5, 16254556), (10, 8127278), (20, 4063639), (443, 183460), (886, 91730), (1772, 45865), (2215, 36692), (4430, 18346), (8860, 9173)]