1278890240

素因数分解:

$2^8\times 5^1\times {\mathrm{999133}}^1$

素因数の和:999154

約数の個数: 36

約数和(自身を含む): 3063344844

約数和(自身を除く): 1784454604

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 999133, 1998266, 3996532, 4995665, 7993064, 9991330, 15986128, 19982660, 31972256, 39965320, 63944512, 79930640, 127889024, 159861280, 255778048, 319722560, 639445120, 1278890240]

約数ペア:

[(1, 1278890240), (2, 639445120), (4, 319722560), (5, 255778048), (8, 159861280), (10, 127889024), (16, 79930640), (20, 63944512), (32, 39965320), (40, 31972256), (64, 19982660), (80, 15986128), (128, 9991330), (160, 7993064), (256, 4995665), (320, 3996532), (640, 1998266), (1280, 999133)]