20303955

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1499}}^1$

素因数の和:1560

約数の個数: 48

約数和(自身を含む): 41184000

約数和(自身を除く): 20880045

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 43, 45, 63, 105, 129, 215, 301, 315, 387, 645, 903, 1499, 1505, 1935, 2709, 4497, 4515, 7495, 10493, 13491, 13545, 22485, 31479, 52465, 64457, 67455, 94437, 157395, 193371, 322285, 451199, 472185, 580113, 966855, 1353597, 2255995, 2900565, 4060791, 6767985, 20303955]

約数ペア:

[(1, 20303955), (3, 6767985), (5, 4060791), (7, 2900565), (9, 2255995), (15, 1353597), (21, 966855), (35, 580113), (43, 472185), (45, 451199), (63, 322285), (105, 193371), (129, 157395), (215, 94437), (301, 67455), (315, 64457), (387, 52465), (645, 31479), (903, 22485), (1499, 13545), (1505, 13491), (1935, 10493), (2709, 7495), (4497, 4515)]