21187888

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69697}}^1$

素因数の和:69724

約数の個数: 20

約数和(自身を含む): 43212760

約数和(自身を除く): 22024872

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69697, 139394, 278788, 557576, 1115152, 1324243, 2648486, 5296972, 10593944, 21187888]

約数ペア:

[(1, 21187888), (2, 10593944), (4, 5296972), (8, 2648486), (16, 1324243), (19, 1115152), (38, 557576), (76, 278788), (152, 139394), (304, 69697)]