20921654

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{73}}^2\times {\mathrm{151}}^1$

素因数の和:312

約数の個数: 24

約数和(自身を含む): 34492752

約数和(自身を除く): 13571098

約数列:

[1, 2, 13, 26, 73, 146, 151, 302, 949, 1898, 1963, 3926, 5329, 10658, 11023, 22046, 69277, 138554, 143299, 286598, 804679, 1609358, 10460827, 20921654]

約数ペア:

[(1, 20921654), (2, 10460827), (13, 1609358), (26, 804679), (73, 286598), (146, 143299), (151, 138554), (302, 69277), (949, 22046), (1898, 11023), (1963, 10658), (3926, 5329)]