19877920

素因数分解:

$2^5\times 5^1\times {\mathrm{283}}^1\times {\mathrm{439}}^1$

素因数の和:737

約数の個数: 48

約数和(自身を含む): 47234880

約数和(自身を除く): 27356960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 283, 439, 566, 878, 1132, 1415, 1756, 2195, 2264, 2830, 3512, 4390, 4528, 5660, 7024, 8780, 9056, 11320, 14048, 17560, 22640, 35120, 45280, 70240, 124237, 248474, 496948, 621185, 993896, 1242370, 1987792, 2484740, 3975584, 4969480, 9938960, 19877920]

約数ペア:

[(1, 19877920), (2, 9938960), (4, 4969480), (5, 3975584), (8, 2484740), (10, 1987792), (16, 1242370), (20, 993896), (32, 621185), (40, 496948), (80, 248474), (160, 124237), (283, 70240), (439, 45280), (566, 35120), (878, 22640), (1132, 17560), (1415, 14048), (1756, 11320), (2195, 9056), (2264, 8780), (2830, 7024), (3512, 5660), (4390, 4528)]