19804280

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5563}}^1$

素因数の和:5663

約数の個数: 32

約数和(自身を含む): 45068400

約数和(自身を除く): 25264120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5563, 11126, 22252, 27815, 44504, 55630, 111260, 222520, 495107, 990214, 1980428, 2475535, 3960856, 4951070, 9902140, 19804280]

約数ペア:

[(1, 19804280), (2, 9902140), (4, 4951070), (5, 3960856), (8, 2475535), (10, 1980428), (20, 990214), (40, 495107), (89, 222520), (178, 111260), (356, 55630), (445, 44504), (712, 27815), (890, 22252), (1780, 11126), (3560, 5563)]