18447920

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2591}}^1$

素因数の和:2693

約数の個数: 40

約数和(自身を含む): 43390080

約数和(自身を除く): 24942160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2591, 3560, 5182, 7120, 10364, 12955, 20728, 25910, 41456, 51820, 103640, 207280, 230599, 461198, 922396, 1152995, 1844792, 2305990, 3689584, 4611980, 9223960, 18447920]

約数ペア:

[(1, 18447920), (2, 9223960), (4, 4611980), (5, 3689584), (8, 2305990), (10, 1844792), (16, 1152995), (20, 922396), (40, 461198), (80, 230599), (89, 207280), (178, 103640), (356, 51820), (445, 41456), (712, 25910), (890, 20728), (1424, 12955), (1780, 10364), (2591, 7120), (3560, 5182)]