21791800

素因数分解:

$2^3\times 5^2\times {\mathrm{108959}}^1$

素因数の和:108975

約数の個数: 24

約数和(自身を含む): 50666400

約数和(自身を除く): 28874600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 108959, 217918, 435836, 544795, 871672, 1089590, 2179180, 2723975, 4358360, 5447950, 10895900, 21791800]

約数ペア:

[(1, 21791800), (2, 10895900), (4, 5447950), (5, 4358360), (8, 2723975), (10, 2179180), (20, 1089590), (25, 871672), (40, 544795), (50, 435836), (100, 217918), (200, 108959)]