21022768

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1907}}^1$

素因数の和:1981

約数の個数: 40

約数和(自身を含む): 44715888

約数和(自身を除く): 23693120

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1907, 2756, 3814, 5512, 7628, 11024, 15256, 24791, 30512, 49582, 99164, 101071, 198328, 202142, 396656, 404284, 808568, 1313923, 1617136, 2627846, 5255692, 10511384, 21022768]

約数ペア:

[(1, 21022768), (2, 10511384), (4, 5255692), (8, 2627846), (13, 1617136), (16, 1313923), (26, 808568), (52, 404284), (53, 396656), (104, 202142), (106, 198328), (208, 101071), (212, 99164), (424, 49582), (689, 30512), (848, 24791), (1378, 15256), (1907, 11024), (2756, 7628), (3814, 5512)]