219487788280

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{8480981}}^1$

素因数の和:8481639

約数の個数: 32

約数和(自身を含む): 494610870240

約数和(自身を除く): 275123081960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1294, 2588, 3235, 5176, 6470, 12940, 25880, 8480981, 16961962, 33923924, 42404905, 67847848, 84809810, 169619620, 339239240, 5487194707, 10974389414, 21948778828, 27435973535, 43897557656, 54871947070, 109743894140, 219487788280]

約数ペア:

[(1, 219487788280), (2, 109743894140), (4, 54871947070), (5, 43897557656), (8, 27435973535), (10, 21948778828), (20, 10974389414), (40, 5487194707), (647, 339239240), (1294, 169619620), (2588, 84809810), (3235, 67847848), (5176, 42404905), (6470, 33923924), (12940, 16961962), (25880, 8480981)]