20217860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{77761}}^1$

素因数の和:77783

約数の個数: 24

約数和(自身を含む): 45724056

約数和(自身を除く): 25506196

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 77761, 155522, 311044, 388805, 777610, 1010893, 1555220, 2021786, 4043572, 5054465, 10108930, 20217860]

約数ペア:

[(1, 20217860), (2, 10108930), (4, 5054465), (5, 4043572), (10, 2021786), (13, 1555220), (20, 1010893), (26, 777610), (52, 388805), (65, 311044), (130, 155522), (260, 77761)]