18685780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{13159}}^1$

素因数の和:13239

約数の個数: 24

約数和(自身を含む): 39795840

約数和(自身を除く): 21110060

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 13159, 26318, 52636, 65795, 131590, 263180, 934289, 1868578, 3737156, 4671445, 9342890, 18685780]

約数ペア:

[(1, 18685780), (2, 9342890), (4, 4671445), (5, 3737156), (10, 1868578), (20, 934289), (71, 263180), (142, 131590), (284, 65795), (355, 52636), (710, 26318), (1420, 13159)]