405121520

素因数分解:

$2^4\times 5^1\times {\mathrm{5064019}}^1$

素因数の和:5064032

約数の個数: 20

約数和(自身を含む): 941907720

約数和(自身を除く): 536786200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5064019, 10128038, 20256076, 25320095, 40512152, 50640190, 81024304, 101280380, 202560760, 405121520]

約数ペア:

[(1, 405121520), (2, 202560760), (4, 101280380), (5, 81024304), (8, 50640190), (10, 40512152), (16, 25320095), (20, 20256076), (40, 10128038), (80, 5064019)]