20877320

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1063}}^1$

素因数の和:1565

約数の個数: 32

約数和(自身を含む): 47113920

約数和(自身を除く): 26236600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1063, 1964, 2126, 2455, 3928, 4252, 4910, 5315, 8504, 9820, 10630, 19640, 21260, 42520, 521933, 1043866, 2087732, 2609665, 4175464, 5219330, 10438660, 20877320]

約数ペア:

[(1, 20877320), (2, 10438660), (4, 5219330), (5, 4175464), (8, 2609665), (10, 2087732), (20, 1043866), (40, 521933), (491, 42520), (982, 21260), (1063, 19640), (1964, 10630), (2126, 9820), (2455, 8504), (3928, 5315), (4252, 4910)]