28742007

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{521}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 45702144

約数和(自身を除く): 16960137

約数列:

[1, 3, 7, 21, 37, 71, 111, 213, 259, 497, 521, 777, 1491, 1563, 2627, 3647, 7881, 10941, 18389, 19277, 36991, 55167, 57831, 110973, 134939, 258937, 404817, 776811, 1368667, 4106001, 9580669, 28742007]

約数ペア:

[(1, 28742007), (3, 9580669), (7, 4106001), (21, 1368667), (37, 776811), (71, 404817), (111, 258937), (213, 134939), (259, 110973), (497, 57831), (521, 55167), (777, 36991), (1491, 19277), (1563, 18389), (2627, 10941), (3647, 7881)]