20320480

素因数分解:

$2^5\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1427}}^1$

素因数の和:1531

約数の個数: 48

約数和(自身を含む): 48580560

約数和(自身を除く): 28260080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 89, 160, 178, 356, 445, 712, 890, 1424, 1427, 1780, 2848, 2854, 3560, 5708, 7120, 7135, 11416, 14240, 14270, 22832, 28540, 45664, 57080, 114160, 127003, 228320, 254006, 508012, 635015, 1016024, 1270030, 2032048, 2540060, 4064096, 5080120, 10160240, 20320480]

約数ペア:

[(1, 20320480), (2, 10160240), (4, 5080120), (5, 4064096), (8, 2540060), (10, 2032048), (16, 1270030), (20, 1016024), (32, 635015), (40, 508012), (80, 254006), (89, 228320), (160, 127003), (178, 114160), (356, 57080), (445, 45664), (712, 28540), (890, 22832), (1424, 14270), (1427, 14240), (1780, 11416), (2848, 7135), (2854, 7120), (3560, 5708)]