20900800

素因数分解:

$2^6\times 5^2\times {\mathrm{13063}}^1$

素因数の和:13085

約数の個数: 42

約数和(自身を含む): 51432968

約数和(自身を除く): 30532168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 13063, 26126, 52252, 65315, 104504, 130630, 209008, 261260, 326575, 418016, 522520, 653150, 836032, 1045040, 1306300, 2090080, 2612600, 4180160, 5225200, 10450400, 20900800]

約数ペア:

[(1, 20900800), (2, 10450400), (4, 5225200), (5, 4180160), (8, 2612600), (10, 2090080), (16, 1306300), (20, 1045040), (25, 836032), (32, 653150), (40, 522520), (50, 418016), (64, 326575), (80, 261260), (100, 209008), (160, 130630), (200, 104504), (320, 65315), (400, 52252), (800, 26126), (1600, 13063)]