20030720

素因数分解:

$2^8\times 5^1\times {\mathrm{15649}}^1$

素因数の和:15670

約数の個数: 36

約数和(自身を含む): 47982900

約数和(自身を除く): 27952180

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15649, 31298, 62596, 78245, 125192, 156490, 250384, 312980, 500768, 625960, 1001536, 1251920, 2003072, 2503840, 4006144, 5007680, 10015360, 20030720]

約数ペア:

[(1, 20030720), (2, 10015360), (4, 5007680), (5, 4006144), (8, 2503840), (10, 2003072), (16, 1251920), (20, 1001536), (32, 625960), (40, 500768), (64, 312980), (80, 250384), (128, 156490), (160, 125192), (256, 78245), (320, 62596), (640, 31298), (1280, 15649)]