19973135

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6271}}^1$

素因数の和:6303

約数の個数: 24

約数和(自身を含む): 30030336

約数和(自身を除く): 10057201

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6271, 31355, 43897, 81523, 219485, 307279, 407615, 570661, 1536395, 2853305, 3994627, 19973135]

約数ペア:

[(1, 19973135), (5, 3994627), (7, 2853305), (13, 1536395), (35, 570661), (49, 407615), (65, 307279), (91, 219485), (245, 81523), (455, 43897), (637, 31355), (3185, 6271)]