21539428

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{179}}^1\times {\mathrm{449}}^1$

素因数の和:699

約数の個数: 24

約数和(自身を含む): 38556000

約数和(自身を除く): 17016572

約数列:

[1, 2, 4, 67, 134, 179, 268, 358, 449, 716, 898, 1796, 11993, 23986, 30083, 47972, 60166, 80371, 120332, 160742, 321484, 5384857, 10769714, 21539428]

約数ペア:

[(1, 21539428), (2, 10769714), (4, 5384857), (67, 321484), (134, 160742), (179, 120332), (268, 80371), (358, 60166), (449, 47972), (716, 30083), (898, 23986), (1796, 11993)]