21664175

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{349}}^1$

素因数の和:563

約数の個数: 24

約数和(自身を含む): 29164800

約数和(自身を除く): 7500625

約数列:

[1, 5, 13, 25, 65, 191, 325, 349, 955, 1745, 2483, 4537, 4775, 8725, 12415, 22685, 62075, 66659, 113425, 333295, 866567, 1666475, 4332835, 21664175]

約数ペア:

[(1, 21664175), (5, 4332835), (13, 1666475), (25, 866567), (65, 333295), (191, 113425), (325, 66659), (349, 62075), (955, 22685), (1745, 12415), (2483, 8725), (4537, 4775)]