18984847

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{173}}^1\times {\mathrm{257}}^1$

素因数の和:498

約数の個数: 16

約数和(自身を含む): 22266432

約数和(自身を除く): 3281585

約数列:

[1, 7, 61, 173, 257, 427, 1211, 1799, 10553, 15677, 44461, 73871, 109739, 311227, 2712121, 18984847]

約数ペア:

[(1, 18984847), (7, 2712121), (61, 311227), (173, 109739), (257, 73871), (427, 44461), (1211, 15677), (1799, 10553)]