20748903

素因数分解:

$3^1\times 7^2\times {\mathrm{191}}^1\times {\mathrm{739}}^1$

素因数の和:947

約数の個数: 24

約数和(自身を含む): 32394240

約数和(自身を除く): 11645337

約数列:

[1, 3, 7, 21, 49, 147, 191, 573, 739, 1337, 2217, 4011, 5173, 9359, 15519, 28077, 36211, 108633, 141149, 423447, 988043, 2964129, 6916301, 20748903]

約数ペア:

[(1, 20748903), (3, 6916301), (7, 2964129), (21, 988043), (49, 423447), (147, 141149), (191, 108633), (573, 36211), (739, 28077), (1337, 15519), (2217, 9359), (4011, 5173)]