21001292

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{661}}^1$

素因数の和:738

約数の個数: 36

約数和(自身を含む): 40705056

約数和(自身を除く): 19703764

約数列:

[1, 2, 4, 13, 26, 47, 52, 94, 169, 188, 338, 611, 661, 676, 1222, 1322, 2444, 2644, 7943, 8593, 15886, 17186, 31067, 31772, 34372, 62134, 111709, 124268, 223418, 403871, 446836, 807742, 1615484, 5250323, 10500646, 21001292]

約数ペア:

[(1, 21001292), (2, 10500646), (4, 5250323), (13, 1615484), (26, 807742), (47, 446836), (52, 403871), (94, 223418), (169, 124268), (188, 111709), (338, 62134), (611, 34372), (661, 31772), (676, 31067), (1222, 17186), (1322, 15886), (2444, 8593), (2644, 7943)]