19640960

素因数分解:

$2^7\times 5^1\times {\mathrm{30689}}^1$

素因数の和:30708

約数の個数: 32

約数和(自身を含む): 46955700

約数和(自身を除く): 27314740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 30689, 61378, 122756, 153445, 245512, 306890, 491024, 613780, 982048, 1227560, 1964096, 2455120, 3928192, 4910240, 9820480, 19640960]

約数ペア:

[(1, 19640960), (2, 9820480), (4, 4910240), (5, 3928192), (8, 2455120), (10, 1964096), (16, 1227560), (20, 982048), (32, 613780), (40, 491024), (64, 306890), (80, 245512), (128, 153445), (160, 122756), (320, 61378), (640, 30689)]