21080025

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{4931}}^1$

素因数の和:4966

約数の個数: 36

約数和(自身を含む): 39751920

約数和(自身を除く): 18671895

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 285, 475, 855, 1425, 4275, 4931, 14793, 24655, 44379, 73965, 93689, 123275, 221895, 281067, 369825, 468445, 843201, 1109475, 1405335, 2342225, 4216005, 7026675, 21080025]

約数ペア:

[(1, 21080025), (3, 7026675), (5, 4216005), (9, 2342225), (15, 1405335), (19, 1109475), (25, 843201), (45, 468445), (57, 369825), (75, 281067), (95, 221895), (171, 123275), (225, 93689), (285, 73965), (475, 44379), (855, 24655), (1425, 14793), (4275, 4931)]