19996085

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:209

約数の個数: 32

約数和(自身を含む): 26542080

約数和(自身を除く): 6545995

約数列:

[1, 5, 23, 31, 71, 79, 115, 155, 355, 395, 713, 1633, 1817, 2201, 2449, 3565, 5609, 8165, 9085, 11005, 12245, 28045, 50623, 56327, 129007, 173879, 253115, 281635, 645035, 869395, 3999217, 19996085]

約数ペア:

[(1, 19996085), (5, 3999217), (23, 869395), (31, 645035), (71, 281635), (79, 253115), (115, 173879), (155, 129007), (355, 56327), (395, 50623), (713, 28045), (1633, 12245), (1817, 11005), (2201, 9085), (2449, 8165), (3565, 5609)]