20828164

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{18143}}^1$

素因数の和:18195

約数の個数: 24

約数和(自身を含む): 42674688

約数和(自身を除く): 21846524

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 164, 287, 574, 1148, 18143, 36286, 72572, 127001, 254002, 508004, 743863, 1487726, 2975452, 5207041, 10414082, 20828164]

約数ペア:

[(1, 20828164), (2, 10414082), (4, 5207041), (7, 2975452), (14, 1487726), (28, 743863), (41, 508004), (82, 254002), (164, 127001), (287, 72572), (574, 36286), (1148, 18143)]