20517760

素因数分解:

$2^7\times 5^1\times {\mathrm{32059}}^1$

素因数の和:32078

約数の個数: 32

約数和(自身を含む): 49051800

約数和(自身を除く): 28534040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 32059, 64118, 128236, 160295, 256472, 320590, 512944, 641180, 1025888, 1282360, 2051776, 2564720, 4103552, 5129440, 10258880, 20517760]

約数ペア:

[(1, 20517760), (2, 10258880), (4, 5129440), (5, 4103552), (8, 2564720), (10, 2051776), (16, 1282360), (20, 1025888), (32, 641180), (40, 512944), (64, 320590), (80, 256472), (128, 160295), (160, 128236), (320, 64118), (640, 32059)]