990319198

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{505781}}^1$

素因数の和:505883

約数の個数: 16

約数和(自身を含む): 1638733680

約数和(自身を除く): 648414482

約数列:

[1, 2, 11, 22, 89, 178, 979, 1958, 505781, 1011562, 5563591, 11127182, 45014509, 90029018, 495159599, 990319198]

約数ペア:

[(1, 990319198), (2, 495159599), (11, 90029018), (22, 45014509), (89, 11127182), (178, 5563591), (979, 1011562), (1958, 505781)]