21491920

素因数分解:

$2^4\times 5^1\times {\mathrm{233}}^1\times {\mathrm{1153}}^1$

素因数の和:1399

約数の個数: 40

約数和(自身を含む): 50226696

約数和(自身を除く): 28734776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 233, 466, 932, 1153, 1165, 1864, 2306, 2330, 3728, 4612, 4660, 5765, 9224, 9320, 11530, 18448, 18640, 23060, 46120, 92240, 268649, 537298, 1074596, 1343245, 2149192, 2686490, 4298384, 5372980, 10745960, 21491920]

約数ペア:

[(1, 21491920), (2, 10745960), (4, 5372980), (5, 4298384), (8, 2686490), (10, 2149192), (16, 1343245), (20, 1074596), (40, 537298), (80, 268649), (233, 92240), (466, 46120), (932, 23060), (1153, 18640), (1165, 18448), (1864, 11530), (2306, 9320), (2330, 9224), (3728, 5765), (4612, 4660)]