1818820

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{431}}^1$

素因数の和:651

約数の個数: 24

約数和(自身を含む): 3846528

約数和(自身を除く): 2027708

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 431, 844, 862, 1055, 1724, 2110, 2155, 4220, 4310, 8620, 90941, 181882, 363764, 454705, 909410, 1818820]

約数ペア:

[(1, 1818820), (2, 909410), (4, 454705), (5, 363764), (10, 181882), (20, 90941), (211, 8620), (422, 4310), (431, 4220), (844, 2155), (862, 2110), (1055, 1724)]