18780417

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{12203}}^1$

素因数の和:12234

約数の個数: 20

約数和(自身を含む): 29533680

約数和(自身を除く): 10753263

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 12203, 36609, 109827, 231857, 329481, 695571, 988443, 2086713, 6260139, 18780417]

約数ペア:

[(1, 18780417), (3, 6260139), (9, 2086713), (19, 988443), (27, 695571), (57, 329481), (81, 231857), (171, 109827), (513, 36609), (1539, 12203)]