19540975

素因数分解:

$5^2\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:291

約数の個数: 24

約数和(自身を含む): 25043040

約数和(自身を除く): 5502065

約数列:

[1, 5, 25, 71, 101, 109, 355, 505, 545, 1775, 2525, 2725, 7171, 7739, 11009, 35855, 38695, 55045, 179275, 193475, 275225, 781639, 3908195, 19540975]

約数ペア:

[(1, 19540975), (5, 3908195), (25, 781639), (71, 275225), (101, 193475), (109, 179275), (355, 55045), (505, 38695), (545, 35855), (1775, 11009), (2525, 7739), (2725, 7171)]