21655365

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{521}}^1$

素因数の和:709

約数の個数: 32

約数和(自身を含む): 36982656

約数和(自身を除く): 15327291

約数列:

[1, 3, 5, 15, 17, 51, 85, 163, 255, 489, 521, 815, 1563, 2445, 2605, 2771, 7815, 8313, 8857, 13855, 26571, 41565, 44285, 84923, 132855, 254769, 424615, 1273845, 1443691, 4331073, 7218455, 21655365]

約数ペア:

[(1, 21655365), (3, 7218455), (5, 4331073), (15, 1443691), (17, 1273845), (51, 424615), (85, 254769), (163, 132855), (255, 84923), (489, 44285), (521, 41565), (815, 26571), (1563, 13855), (2445, 8857), (2605, 8313), (2771, 7815)]