20416520

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4019}}^1$

素因数の和:4157

約数の個数: 32

約数和(自身を含む): 46310400

約数和(自身を除く): 25893880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4019, 5080, 8038, 16076, 20095, 32152, 40190, 80380, 160760, 510413, 1020826, 2041652, 2552065, 4083304, 5104130, 10208260, 20416520]

約数ペア:

[(1, 20416520), (2, 10208260), (4, 5104130), (5, 4083304), (8, 2552065), (10, 2041652), (20, 1020826), (40, 510413), (127, 160760), (254, 80380), (508, 40190), (635, 32152), (1016, 20095), (1270, 16076), (2540, 8038), (4019, 5080)]