7281980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{4091}}^1$

素因数の和:4189

約数の個数: 24

約数和(自身を含む): 15467760

約数和(自身を除く): 8185780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 4091, 8182, 16364, 20455, 40910, 81820, 364099, 728198, 1456396, 1820495, 3640990, 7281980]

約数ペア:

[(1, 7281980), (2, 3640990), (4, 1820495), (5, 1456396), (10, 728198), (20, 364099), (89, 81820), (178, 40910), (356, 20455), (445, 16364), (890, 8182), (1780, 4091)]