20517800

素因数分解:

$2^3\times 5^2\times {\mathrm{173}}^1\times {\mathrm{593}}^1$

素因数の和:782

約数の個数: 48

約数和(自身を含む): 48060540

約数和(自身を除く): 27542740

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 173, 200, 346, 593, 692, 865, 1186, 1384, 1730, 2372, 2965, 3460, 4325, 4744, 5930, 6920, 8650, 11860, 14825, 17300, 23720, 29650, 34600, 59300, 102589, 118600, 205178, 410356, 512945, 820712, 1025890, 2051780, 2564725, 4103560, 5129450, 10258900, 20517800]

約数ペア:

[(1, 20517800), (2, 10258900), (4, 5129450), (5, 4103560), (8, 2564725), (10, 2051780), (20, 1025890), (25, 820712), (40, 512945), (50, 410356), (100, 205178), (173, 118600), (200, 102589), (346, 59300), (593, 34600), (692, 29650), (865, 23720), (1186, 17300), (1384, 14825), (1730, 11860), (2372, 8650), (2965, 6920), (3460, 5930), (4325, 4744)]