21234540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{547}}^1\times {\mathrm{647}}^1$

素因数の和:1206

約数の個数: 48

約数和(自身を含む): 59657472

約数和(自身を除く): 38422932

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 547, 647, 1094, 1294, 1641, 1941, 2188, 2588, 2735, 3235, 3282, 3882, 5470, 6470, 6564, 7764, 8205, 9705, 10940, 12940, 16410, 19410, 32820, 38820, 353909, 707818, 1061727, 1415636, 1769545, 2123454, 3539090, 4246908, 5308635, 7078180, 10617270, 21234540]

約数ペア:

[(1, 21234540), (2, 10617270), (3, 7078180), (4, 5308635), (5, 4246908), (6, 3539090), (10, 2123454), (12, 1769545), (15, 1415636), (20, 1061727), (30, 707818), (60, 353909), (547, 38820), (647, 32820), (1094, 19410), (1294, 16410), (1641, 12940), (1941, 10940), (2188, 9705), (2588, 8205), (2735, 7764), (3235, 6564), (3282, 6470), (3882, 5470)]