81821560

素因数分解:

$2^3\times 5^1\times {\mathrm{2045539}}^1$

素因数の和:2045550

約数の個数: 16

約数和(自身を含む): 184098600

約数和(自身を除く): 102277040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2045539, 4091078, 8182156, 10227695, 16364312, 20455390, 40910780, 81821560]

約数ペア:

[(1, 81821560), (2, 40910780), (4, 20455390), (5, 16364312), (8, 10227695), (10, 8182156), (20, 4091078), (40, 2045539)]