20408418

素因数分解:

$2^1\times 3^2\times {\mathrm{821}}^1\times {\mathrm{1381}}^1$

素因数の和:2210

約数の個数: 24

約数和(自身を含む): 44304156

約数和(自身を除く): 23895738

約数列:

[1, 2, 3, 6, 9, 18, 821, 1381, 1642, 2463, 2762, 4143, 4926, 7389, 8286, 12429, 14778, 24858, 1133801, 2267602, 3401403, 6802806, 10204209, 20408418]

約数ペア:

[(1, 20408418), (2, 10204209), (3, 6802806), (6, 3401403), (9, 2267602), (18, 1133801), (821, 24858), (1381, 14778), (1642, 12429), (2463, 8286), (2762, 7389), (4143, 4926)]