21438345

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^2\times {\mathrm{647}}^1$

素因数の和:749

約数の個数: 24

約数和(自身を含む): 35100864

約数和(自身を除く): 13662519

約数列:

[1, 3, 5, 15, 47, 141, 235, 647, 705, 1941, 2209, 3235, 6627, 9705, 11045, 30409, 33135, 91227, 152045, 456135, 1429223, 4287669, 7146115, 21438345]

約数ペア:

[(1, 21438345), (3, 7146115), (5, 4287669), (15, 1429223), (47, 456135), (141, 152045), (235, 91227), (647, 33135), (705, 30409), (1941, 11045), (2209, 9705), (3235, 6627)]