20456000

素因数分解:

$2^6\times 5^3\times {\mathrm{2557}}^1$

素因数の和:2584

約数の個数: 56

約数和(自身を含む): 50679096

約数和(自身を除く): 30223096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 800, 1000, 1600, 2000, 2557, 4000, 5114, 8000, 10228, 12785, 20456, 25570, 40912, 51140, 63925, 81824, 102280, 127850, 163648, 204560, 255700, 319625, 409120, 511400, 639250, 818240, 1022800, 1278500, 2045600, 2557000, 4091200, 5114000, 10228000, 20456000]

約数ペア:

[(1, 20456000), (2, 10228000), (4, 5114000), (5, 4091200), (8, 2557000), (10, 2045600), (16, 1278500), (20, 1022800), (25, 818240), (32, 639250), (40, 511400), (50, 409120), (64, 319625), (80, 255700), (100, 204560), (125, 163648), (160, 127850), (200, 102280), (250, 81824), (320, 63925), (400, 51140), (500, 40912), (800, 25570), (1000, 20456), (1600, 12785), (2000, 10228), (2557, 8000), (4000, 5114)]