21199984

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{449}}^1$

素因数の和:697

約数の個数: 40

約数和(自身を含む): 44528400

約数和(自身を除く): 23328416

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 227, 449, 454, 898, 908, 1796, 1816, 2951, 3592, 3632, 5837, 5902, 7184, 11674, 11804, 23348, 23608, 46696, 47216, 93392, 101923, 203846, 407692, 815384, 1324999, 1630768, 2649998, 5299996, 10599992, 21199984]

約数ペア:

[(1, 21199984), (2, 10599992), (4, 5299996), (8, 2649998), (13, 1630768), (16, 1324999), (26, 815384), (52, 407692), (104, 203846), (208, 101923), (227, 93392), (449, 47216), (454, 46696), (898, 23608), (908, 23348), (1796, 11804), (1816, 11674), (2951, 7184), (3592, 5902), (3632, 5837)]