19809040

素因数分解:

$2^4\times 5^1\times {\mathrm{247613}}^1$

素因数の和:247626

約数の個数: 20

約数和(自身を含む): 46056204

約数和(自身を除く): 26247164

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247613, 495226, 990452, 1238065, 1980904, 2476130, 3961808, 4952260, 9904520, 19809040]

約数ペア:

[(1, 19809040), (2, 9904520), (4, 4952260), (5, 3961808), (8, 2476130), (10, 1980904), (16, 1238065), (20, 990452), (40, 495226), (80, 247613)]