19897345

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{443}}^1\times {\mathrm{691}}^1$

素因数の和:1152

約数の個数: 16

約数和(自身を含む): 25808832

約数和(自身を除く): 5911487

約数列:

[1, 5, 13, 65, 443, 691, 2215, 3455, 5759, 8983, 28795, 44915, 306113, 1530565, 3979469, 19897345]

約数ペア:

[(1, 19897345), (5, 3979469), (13, 1530565), (65, 306113), (443, 44915), (691, 28795), (2215, 8983), (3455, 5759)]