21277264

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{69991}}^1$

素因数の和:70018

約数の個数: 20

約数和(自身を含む): 43395040

約数和(自身を除く): 22117776

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 69991, 139982, 279964, 559928, 1119856, 1329829, 2659658, 5319316, 10638632, 21277264]

約数ペア:

[(1, 21277264), (2, 10638632), (4, 5319316), (8, 2659658), (16, 1329829), (19, 1119856), (38, 559928), (76, 279964), (152, 139982), (304, 69991)]