1780840

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^2$

素因数の和:433

約数の個数: 24

約数和(自身を含む): 4025970

約数和(自身を除く): 2245130

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 4220, 8440, 44521, 89042, 178084, 222605, 356168, 445210, 890420, 1780840]

約数ペア:

[(1, 1780840), (2, 890420), (4, 445210), (5, 356168), (8, 222605), (10, 178084), (20, 89042), (40, 44521), (211, 8440), (422, 4220), (844, 2110), (1055, 1688)]