28870821

素因数分解:

$3^2\times 7^1\times {\mathrm{487}}^1\times {\mathrm{941}}^1$

素因数の和:1441

約数の個数: 24

約数和(自身を含む): 47808384

約数和(自身を除く): 18937563

約数列:

[1, 3, 7, 9, 21, 63, 487, 941, 1461, 2823, 3409, 4383, 6587, 8469, 10227, 19761, 30681, 59283, 458267, 1374801, 3207869, 4124403, 9623607, 28870821]

約数ペア:

[(1, 28870821), (3, 9623607), (7, 4124403), (9, 3207869), (21, 1374801), (63, 458267), (487, 59283), (941, 30681), (1461, 19761), (2823, 10227), (3409, 8469), (4383, 6587)]