20468480

素因数分解:

$2^8\times 5^1\times {\mathrm{15991}}^1$

素因数の和:16012

約数の個数: 36

約数和(自身を含む): 49031472

約数和(自身を除く): 28562992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15991, 31982, 63964, 79955, 127928, 159910, 255856, 319820, 511712, 639640, 1023424, 1279280, 2046848, 2558560, 4093696, 5117120, 10234240, 20468480]

約数ペア:

[(1, 20468480), (2, 10234240), (4, 5117120), (5, 4093696), (8, 2558560), (10, 2046848), (16, 1279280), (20, 1023424), (32, 639640), (40, 511712), (64, 319820), (80, 255856), (128, 159910), (160, 127928), (256, 79955), (320, 63964), (640, 31982), (1280, 15991)]