20861235

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10781}}^1$

素因数の和:10835

約数の個数: 24

約数和(自身を含む): 37003824

約数和(自身を除く): 16142589

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10781, 32343, 53905, 97029, 161715, 463583, 485145, 1390749, 2317915, 4172247, 6953745, 20861235]

約数ペア:

[(1, 20861235), (3, 6953745), (5, 4172247), (9, 2317915), (15, 1390749), (43, 485145), (45, 463583), (129, 161715), (215, 97029), (387, 53905), (645, 32343), (1935, 10781)]