21219304

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{64693}}^1$

素因数の和:64740

約数の個数: 16

約数和(自身を含む): 40757220

約数和(自身を除く): 19537916

約数列:

[1, 2, 4, 8, 41, 82, 164, 328, 64693, 129386, 258772, 517544, 2652413, 5304826, 10609652, 21219304]

約数ペア:

[(1, 21219304), (2, 10609652), (4, 5304826), (8, 2652413), (41, 517544), (82, 258772), (164, 129386), (328, 64693)]