21961648

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{233}}^1$

素因数の和:421

約数の個数: 40

約数和(自身を含む): 44046288

約数和(自身を除く): 22084640

約数列:

[1, 2, 4, 8, 16, 43, 86, 137, 172, 233, 274, 344, 466, 548, 688, 932, 1096, 1864, 2192, 3728, 5891, 10019, 11782, 20038, 23564, 31921, 40076, 47128, 63842, 80152, 94256, 127684, 160304, 255368, 510736, 1372603, 2745206, 5490412, 10980824, 21961648]

約数ペア:

[(1, 21961648), (2, 10980824), (4, 5490412), (8, 2745206), (16, 1372603), (43, 510736), (86, 255368), (137, 160304), (172, 127684), (233, 94256), (274, 80152), (344, 63842), (466, 47128), (548, 40076), (688, 31921), (932, 23564), (1096, 20038), (1864, 11782), (2192, 10019), (3728, 5891)]