21908481

素因数分解:

$3^1\times 7^1\times {\mathrm{557}}^1\times {\mathrm{1873}}^1$

素因数の和:2440

約数の個数: 16

約数和(自身を含む): 33462144

約数和(自身を除く): 11553663

約数列:

[1, 3, 7, 21, 557, 1671, 1873, 3899, 5619, 11697, 13111, 39333, 1043261, 3129783, 7302827, 21908481]

約数ペア:

[(1, 21908481), (3, 7302827), (7, 3129783), (21, 1043261), (557, 39333), (1671, 13111), (1873, 11697), (3899, 5619)]