28139937

素因数分解:

$3^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{9781}}^1$

素因数の和:9928

約数の個数: 16

約数和(自身を含む): 43197312

約数和(自身を除く): 15057375

約数列:

[1, 3, 7, 21, 137, 411, 959, 2877, 9781, 29343, 68467, 205401, 1339997, 4019991, 9379979, 28139937]

約数ペア:

[(1, 28139937), (3, 9379979), (7, 4019991), (21, 1339997), (137, 205401), (411, 68467), (959, 29343), (2877, 9781)]