19991120

素因数分解:

$2^4\times 5^1\times {\mathrm{283}}^1\times {\mathrm{883}}^1$

素因数の和:1179

約数の個数: 40

約数和(自身を含む): 46696416

約数和(自身を除く): 26705296

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 283, 566, 883, 1132, 1415, 1766, 2264, 2830, 3532, 4415, 4528, 5660, 7064, 8830, 11320, 14128, 17660, 22640, 35320, 70640, 249889, 499778, 999556, 1249445, 1999112, 2498890, 3998224, 4997780, 9995560, 19991120]

約数ペア:

[(1, 19991120), (2, 9995560), (4, 4997780), (5, 3998224), (8, 2498890), (10, 1999112), (16, 1249445), (20, 999556), (40, 499778), (80, 249889), (283, 70640), (566, 35320), (883, 22640), (1132, 17660), (1415, 14128), (1766, 11320), (2264, 8830), (2830, 7064), (3532, 5660), (4415, 4528)]