408021520

素因数分解:

$2^4\times 5^1\times {\mathrm{5100269}}^1$

素因数の和:5100282

約数の個数: 20

約数和(自身を含む): 948650220

約数和(自身を除く): 540628700

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5100269, 10200538, 20401076, 25501345, 40802152, 51002690, 81604304, 102005380, 204010760, 408021520]

約数ペア:

[(1, 408021520), (2, 204010760), (4, 102005380), (5, 81604304), (8, 51002690), (10, 40802152), (16, 25501345), (20, 20401076), (40, 10200538), (80, 5100269)]