20617425

素因数分解:

$3^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{2131}}^1$

素因数の和:2190

約数の個数: 36

約数和(自身を含む): 37804624

約数和(自身を除く): 17187199

約数列:

[1, 3, 5, 9, 15, 25, 43, 45, 75, 129, 215, 225, 387, 645, 1075, 1935, 2131, 3225, 6393, 9675, 10655, 19179, 31965, 53275, 91633, 95895, 159825, 274899, 458165, 479475, 824697, 1374495, 2290825, 4123485, 6872475, 20617425]

約数ペア:

[(1, 20617425), (3, 6872475), (5, 4123485), (9, 2290825), (15, 1374495), (25, 824697), (43, 479475), (45, 458165), (75, 274899), (129, 159825), (215, 95895), (225, 91633), (387, 53275), (645, 31965), (1075, 19179), (1935, 10655), (2131, 9675), (3225, 6393)]