20730880

素因数分解:

$2^{10}\times 5^1\times {\mathrm{4049}}^1$

素因数の和:4074

約数の個数: 44

約数和(自身を含む): 49742100

約数和(自身を除く): 29011220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1024, 1280, 2560, 4049, 5120, 8098, 16196, 20245, 32392, 40490, 64784, 80980, 129568, 161960, 259136, 323920, 518272, 647840, 1036544, 1295680, 2073088, 2591360, 4146176, 5182720, 10365440, 20730880]

約数ペア:

[(1, 20730880), (2, 10365440), (4, 5182720), (5, 4146176), (8, 2591360), (10, 2073088), (16, 1295680), (20, 1036544), (32, 647840), (40, 518272), (64, 323920), (80, 259136), (128, 161960), (160, 129568), (256, 80980), (320, 64784), (512, 40490), (640, 32392), (1024, 20245), (1280, 16196), (2560, 8098), (4049, 5120)]