17981005

素因数分解:

$5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{1999}}^1$

素因数の和:2268

約数の個数: 16

約数和(自身を含む): 24768000

約数和(自身を除く): 6786995

約数列:

[1, 5, 7, 35, 257, 1285, 1799, 1999, 8995, 9995, 13993, 69965, 513743, 2568715, 3596201, 17981005]

約数ペア:

[(1, 17981005), (5, 3596201), (7, 2568715), (35, 513743), (257, 69965), (1285, 13993), (1799, 9995), (1999, 8995)]