20715760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19919}}^1$

素因数の和:19945

約数の個数: 40

約数和(自身を含む): 51871680

約数和(自身を除く): 31155920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19919, 39838, 79676, 99595, 159352, 199190, 258947, 318704, 398380, 517894, 796760, 1035788, 1294735, 1593520, 2071576, 2589470, 4143152, 5178940, 10357880, 20715760]

約数ペア:

[(1, 20715760), (2, 10357880), (4, 5178940), (5, 4143152), (8, 2589470), (10, 2071576), (13, 1593520), (16, 1294735), (20, 1035788), (26, 796760), (40, 517894), (52, 398380), (65, 318704), (80, 258947), (104, 199190), (130, 159352), (208, 99595), (260, 79676), (520, 39838), (1040, 19919)]