28404789

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{263}}^1$

素因数の和:449

約数の個数: 32

約数和(自身を含む): 44943360

約数和(自身を除く): 16538571

約数列:

[1, 3, 7, 21, 37, 111, 139, 259, 263, 417, 777, 789, 973, 1841, 2919, 5143, 5523, 9731, 15429, 29193, 36001, 36557, 68117, 108003, 109671, 204351, 255899, 767697, 1352609, 4057827, 9468263, 28404789]

約数ペア:

[(1, 28404789), (3, 9468263), (7, 4057827), (21, 1352609), (37, 767697), (111, 255899), (139, 204351), (259, 109671), (263, 108003), (417, 68117), (777, 36557), (789, 36001), (973, 29193), (1841, 15429), (2919, 9731), (5143, 5523)]