28239897

素因数分解:

$3^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{20071}}^1$

素因数の和:20148

約数の個数: 16

約数和(自身を含む): 43676672

約数和(自身を除く): 15436775

約数列:

[1, 3, 7, 21, 67, 201, 469, 1407, 20071, 60213, 140497, 421491, 1344757, 4034271, 9413299, 28239897]

約数ペア:

[(1, 28239897), (3, 9413299), (7, 4034271), (21, 1344757), (67, 421491), (201, 140497), (469, 60213), (1407, 20071)]