28289985

素因数分解:

$3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{21191}}^1$

素因数の和:21288

約数の個数: 16

約数和(自身を含む): 45774720

約数和(自身を除く): 17484735

約数列:

[1, 3, 5, 15, 89, 267, 445, 1335, 21191, 63573, 105955, 317865, 1885999, 5657997, 9429995, 28289985]

約数ペア:

[(1, 28289985), (3, 9429995), (5, 5657997), (15, 1885999), (89, 317865), (267, 105955), (445, 63573), (1335, 21191)]