20011520

素因数分解:

$2^9\times 5^1\times {\mathrm{7817}}^1$

素因数の和:7840

約数の個数: 40

約数和(自身を含む): 47986884

約数和(自身を除く): 27975364

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 7817, 15634, 31268, 39085, 62536, 78170, 125072, 156340, 250144, 312680, 500288, 625360, 1000576, 1250720, 2001152, 2501440, 4002304, 5002880, 10005760, 20011520]

約数ペア:

[(1, 20011520), (2, 10005760), (4, 5002880), (5, 4002304), (8, 2501440), (10, 2001152), (16, 1250720), (20, 1000576), (32, 625360), (40, 500288), (64, 312680), (80, 250144), (128, 156340), (160, 125072), (256, 78170), (320, 62536), (512, 39085), (640, 31268), (1280, 15634), (2560, 7817)]