28151571

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{239}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 44236800

約数和(自身を除く): 16085229

約数列:

[1, 3, 7, 21, 71, 79, 213, 237, 239, 497, 553, 717, 1491, 1659, 1673, 5019, 5609, 16827, 16969, 18881, 39263, 50907, 56643, 117789, 118783, 132167, 356349, 396501, 1340551, 4021653, 9383857, 28151571]

約数ペア:

[(1, 28151571), (3, 9383857), (7, 4021653), (21, 1340551), (71, 396501), (79, 356349), (213, 132167), (237, 118783), (239, 117789), (497, 56643), (553, 50907), (717, 39263), (1491, 18881), (1659, 16969), (1673, 16827), (5019, 5609)]